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green · cool

#b1fddf

a light, electric green · cool · closest name: Aqua Marine

Token name suggestion: Meadow Moss

RGB
177, 253, 223
HSL
156°, 95%, 84%
CMYK
30, 0, 12, 1
Luminance
0.8493

#b1fddf is a light electric green, 156° on the wheel and 78/100 on the cool side. Put black text on it (17.99:1). As text it scores 1.17:1 on white — use #038854 instead. Nearest name is Aqua Marine, nearest Tailwind family is teal.

hsl(156 95% 84%)rgb(177 253 223)Base step 200AAA inkCool

At a glance

Every number on this page in one read: what #b1fddf is made of, how bright it looks, and which way it leans.

Hex
#b1fddf
Hue
156°
green
Saturation
95%
electric
Lightness
84%
light
Brightness
99%
HSV value
Perceived
90%
weighted brightness
Luminance
0.8493
WCAG relative
Temperature
Cool
78/100 cool
Color family
Green
Tone
Electric
Best ink
Black
17.99:1
Closest name
Aqua Marine
ΔE2000 6.1
Chroma
30.3
LCH, 0–130ish
OKLCH L
0.936
perceptual lightness
Tailwind
teal
500 · ΔE 19.7
Web-safe
#99FFCC
nearest of 216
Where it sits
Hue156° of 360°
Saturation95%
Lightness84%
Saturation × lightness field

Left edge is grey, right edge is full chroma; top is white, bottom is black. The dot is #b1fddf.

Temperature
Warm ← → Cool78% cool

Reads cool. Warm and cool siblings keep the same lightness, so you can swap one in without redoing your contrast maths.

Luminance by channel
Red11%
Green83%
Blue6%

Green carries most of what the eye calls brightness — that is why WCAG weights it 0.7152.

Every format

HEX#b1fddf
HEX (8-digit)#b1fddfff
RGBrgb(177, 253, 223)
RGBArgba(177, 253, 223, 1)
HSLhsl(156, 95%, 84%)
HSV / HSBhsv(156, 30%, 99%)
HWBhwb(156 69% 1%)
CMYKcmyk(30%, 0%, 12%, 1%)
LABlab(93.8 -29.4 6.9)
LCHlch(93.8 30.3 166.8)
OKLCHoklch(0.936 0.086 168.0)
XYZ (D65)xyz(66.57, 84.92, 82.68)
Decimal11664863
Display P3color(display-p3 0.694 0.992 0.875)
Web-safe#99FFCC

Copy-ready code

every platformclick to select
/* CSS */
color: #b1fddf;
background-color: #b1fddf;
/* CSS custom property */
--brand: #b1fddf;
/* Tailwind (arbitrary) */
class="text-[#b1fddf] bg-[#b1fddf]"
/* SCSS */
$brand: #b1fddf;
/* SwiftUI */
Color(red: 0.694, green: 0.992, blue: 0.875)
/* UIKit */
UIColor(red: 0.694, green: 0.992, blue: 0.875, alpha: 1)
/* Android XML */
<color name="brand">#B1FDDF</color>
/* Android Compose */
Color(0xFFB1FDDF)
/* Flutter */
Color(0xFFB1FDDF)
/* Python / OpenCV (BGR) */
(223, 253, 177)
/* Python / PIL (RGB) */
(177, 253, 223)
/* Java AWT */
new Color(177, 253, 223)
/* .NET */
Color.FromArgb(255, 177, 253, 223)
/* OpenGL / Unity (0–1) */
(0.6941f, 0.9922f, 0.8745f, 1f)
/* LaTeX */
\definecolor{brand}{RGB}{177,253,223}
modern cssclick to select
/* mix without leaving CSS */
background: color-mix(in oklab, #b1fddf 85%, white);
border-color: color-mix(in oklab, #b1fddf 40%, transparent);
/* theme-aware in one line */
color: light-dark(#037C4C, #D3EEE3);
/* relative colour syntax */
--hover: hsl(from #b1fddf h s calc(l - 7));

Design tokens

The same ramp in the four formats a team actually needs. Paste one and the whole palette lands with it.

css custom propertiesclick to select
:root {
  --brand-50: #F1FDF9;
  --brand-100: #E4FBF2;
  --brand-200: #b1fddf;
  --brand-300: #92FCD2;
  --brand-400: #5BFBBC;
  --brand-500: #24F9A5;
  --brand-600: #06EF93;
  --brand-700: #05C77A;
  --brand-800: #049F62;
  --brand-900: #087348;
  --brand-950: #05482D;
  --brand: #b1fddf;
  --brand-ink: #000000;
  --brand-surface: #F4FAF8;
  --brand-border: #C0EDDB;
  --brand-hover: #8EFCD1;
  --brand-pressed: #6BFBC2;
}
@media (prefers-color-scheme: dark) {
  :root {
    --brand-surface: #14241E;
    --brand-ink: #D3EEE3;
  }
}
tailwind.config.jsclick to select
theme: {
  extend: {
    colors: {
      brand: {
        50: '#F1FDF9',
        100: '#E4FBF2',
        200: '#b1fddf',
        300: '#92FCD2',
        400: '#5BFBBC',
        500: '#24F9A5',
        600: '#06EF93',
        700: '#05C77A',
        800: '#049F62',
        900: '#087348',
        950: '#05482D',
        DEFAULT: '#b1fddf',
      },
    },
  },
}
scss mapclick to select
$brand: (
  '50': #F1FDF9,
  '100': #E4FBF2,
  '200': #b1fddf,
  '300': #92FCD2,
  '400': #5BFBBC,
  '500': #24F9A5,
  '600': #06EF93,
  '700': #05C77A,
  '800': #049F62,
  '900': #087348,
  '950': #05482D,
);
$brand-base: #b1fddf;
$brand-ink: #000000;

@function brand($step) { @return map-get($brand, $step); }
w3c design tokens (json)click to select
{
  "color": {
    "brand": {
      "50": { "$value": "#F1FDF9", "$type": "color" },
      "100": { "$value": "#E4FBF2", "$type": "color" },
      "200": { "$value": "#b1fddf", "$type": "color" },
      "300": { "$value": "#92FCD2", "$type": "color" },
      "400": { "$value": "#5BFBBC", "$type": "color" },
      "500": { "$value": "#24F9A5", "$type": "color" },
      "600": { "$value": "#06EF93", "$type": "color" },
      "700": { "$value": "#05C77A", "$type": "color" },
      "800": { "$value": "#049F62", "$type": "color" },
      "900": { "$value": "#087348", "$type": "color" },
      "950": { "$value": "#05482D", "$type": "color" }
    },
    "brandInk": { "$value": "#000000", "$type": "color" }
  }
}

Best text color

Only one of black and white can be right. This is the one, with the number that proves it.

Readable at a glance#000000 on #b1fddf · 17.99:1
Use #000000AAA at every size.
Aa
12px
Aa
16px
Aa
24px
Aa
White text · 1.17:1
AA fail · AA large fail · AAA fail
Aa
Black text · 17.99:1 · recommended
AA pass · AA large pass · AAA pass
Reading the other direction: #b1fddf as text scores 1.17:1 on white and 17.99:1 on black.
Best tinted ink on it, if plain black or white feels flat: #037C4C at 4.51:1.

Make it accessible

A contrast checker tells you that you failed. This tells you what to ship instead — same hue, same saturation, lightness moved only as far as WCAG demands.

The quick fox
#038854 · 4.51:1
AA on white−57% L
#038854
The quick fox
#03653E · 7.16:1
AAA on white−64% L
#03653E
The quick fox
#b1fddf · 17.99:1
AA on blackalready passes
#b1fddf
The quick fox
#b1fddf · 17.99:1
AAA on blackalready passes
#b1fddf

Large text — 24px regular or 18.66px bold and above — only needs 3:1, so #04A666 is enough for headings on white. Non-text elements such as icons, chart strokes and focus rings also sit at 3:1 under WCAG 2.2 (1.4.11).

Accessibility — WCAG contrast

Aa
#b1fddf on white: 1.17:1
AA ✗ fail · AA-large · AAA
Aa
#b1fddf on black: 17.99:1
AA ✓ pass · AA-large · AAA
Against the neutral ladder

Contrast is symmetric, so each row covers both directions: #b1fddf as text on that neutral, and that neutral as text on #b1fddf.

NeutralRatioBoth directions
White1.17:1AaAa
Slate 501.12:1AaAa
Slate 1001.07:1AaAa
Slate 2001.06:1AaAa
Slate 3001.27:1AaAa
Slate 4002.20:1AaAa
Slate 5004.08:1AaAa
Slate 6006.49:1AaAa
Slate 7008.87:1AaAa
Slate 80012.53:1AaAa
Slate 90015.29:1AaAa
Black17.99:1AaAa
Colour vision deficiency
true color
protanopia · #F9F3DE
deuteranopia · #ECE9E1
tritanopia · #9FFEF4

Roughly one man in twelve has some form of colour vision deficiency. If any of the three panels above is hard to tell apart from a neighbouring colour in your palette, add a shape, an icon or a label so the meaning does not rest on hue alone.

Color scale — 50 to 950

A Tailwind-shaped ramp built around this exact hex. #b1fddf is pinned to step 200; the rest hold its hue and let saturation ease off at the extremes so the pale end never turns neon.

#F1FDF9
#E4FBF2
#b1fddf
#92FCD2
#5BFBBC
#24F9A5
#06EF93
#05C77A
#049F62
#087348
#05482D
Base = 200Lightest = 50 · #F1FDF9Darkest = 950 · #05482DText step on white = 900
Perceptual ramp — OKLCH

The same eleven steps expressed in OKLCH, where equal lightness numbers actually look equally spaced. HSL ramps go muddy in the yellows and washed out in the blues; this one does not. Modern browsers render it natively — the hex ramp above is the fallback.

50100200300400500600700800900950
oklch tokensclick to select
:root {
  --brand-50: oklch(0.97 0.021 168.0);
  --brand-100: oklch(0.94 0.034 168.0);
  --brand-200: oklch(0.88 0.051 168.0);
  --brand-300: oklch(0.80 0.067 168.0);
  --brand-400: oklch(0.72 0.079 168.0);
  --brand-500: oklch(0.64 0.086 168.0);
  --brand-600: oklch(0.56 0.086 168.0);
  --brand-700: oklch(0.48 0.080 168.0);
  --brand-800: oklch(0.40 0.072 168.0);
  --brand-900: oklch(0.32 0.060 168.0);
  --brand-950: oklch(0.24 0.047 168.0);
}

Colors that work with #b1fddf

Not a palette — a role sheet. Each swatch answers one question you will hit while building the component.

Text on it#000000
Black wins here
Surface#F4FAF8
Tinted page background
Border#C0EDDB
Hairlines and dividers
Muted text#4B9B7B
Captions on the surface
Accent#CC0082
Second voice, not a rival
Dark variant#037C4C
Hover, pressed, headers
Light variant#E6FEF5
Selected rows, tints
Dark surface#14241E
Dark-mode background
Hover#8EFCD1
One step down in lightness
Pressed#6BFBC2
Two steps down
Disabled#F3F7F5
Chroma pulled out
Focus ring#C3FFE7
Offset from the fill so it reads
Light mode
Everything in its place

Surface, border, heading and body all derive from this one hue, so the screen stays coherent without a second palette.

Primary actionSecondaryBadge
Dark mode
Same hue, inverted

Lightness flips, hue holds. The accent stays the anchor in both themes.

Primary actionSecondaryAccent

In real components

The same eight roles, wired into the interface patterns you will actually build with them. Every state below is a computed value, not a mock-up.

Buttons and states
Save changesHoverPressedDisabled
OutlineSubtleLinkFocused
Form field
you@company.com

Focus ring uses the light variant so the field still reads as one shape.

Send me product updates
Notice
Your export is ready

The file stays available for seven days. Download it before it expires.

NewBetaDraft
Data
Storage used68%
Acme LtdActive
NorthwindTrial
GlobexActive

How to use #b1fddf

Derived from its contrast, chroma and lightness — not from taste.

Works well for
  • Text and icons on dark surfaces
  • Primary buttons and calls to action
  • Focus rings, active and selected states
  • Card and section backgrounds
  • Brand accents, badges and data highlights
Use with care
  • Text of any size on white — fails WCAG AA
  • Full-page backgrounds — tiring over long sessions
  • White text placed on it
  • Status meaning — pair it with an icon or label, never colour alone
  • Pairing with a same-lightness hue — edges vibrate
Minimum size as text on white
Not as text
Safe as a fill behind white type
No — use #037C4C
Safe as a 1px border on white
No — use #04A666

Meaning and mood

What a colour in this family tends to signal, and how this particular chroma and lightness change the reading.

safegrowingnaturalpermissive

Green means go, well, and grown. It carries finance, sustainability and health with almost no explanation needed.

At this chroma the association is amplified — it will dominate anything placed beside it, so give it space and use it sparingly. The lightness keeps it airy and approachable.

Worth knowing

Red/green pairs are the most common colour-blindness failure — never let the two carry meaning alone.

Reads as
  • FormalityLow
  • EnergyHigh
  • Weight16/100
  • TemperatureCool
  • ApproachabilityReserved

Colour associations are cultural and vary by market. Treat these as a starting point for a conversation with your audience, not a finding about them.

Similar colors

One move away from this hex in each direction. Every swatch is its own page.

Color relationships

The wheel positions with their names attached, so you can grab the one you actually need.

Complementary#FDB1CF
Analogous left#B1FDB9
Analogous right#B1F5FD
Split-complement 1#FDB1F5
Split-complement 2#FDB9B1
Triadic 1#DFB1FD
Triadic 2#FDDFB1
Tetradic#B9B1FD
On the wheel
Base+30°−30°+120°+240°+180°156°

#b1fddf sits at 156°. Every dot is a harmony position and links to its own page in the table alongside.

RGB percentages

Red69.4%
Green99.2%
Blue87.5%
R · 0–255
177
0xb1
G · 0–255
253
0xfd
B · 0–255
223
0xdf

CMYK percentages

Cyan30.0%
Magenta0.0%
Yellow11.9%
Key (black)0.8%

Total ink coverage is 43%. Most commercial presses cap around 300% — above that, sheets stop drying properly.

Color previews

#b1fddf text on a black background

contrast 17.99:1

Card sample

#b1fddf text on a white background

contrast 1.17:1

Card sample

#b1fddf on grey

1.07:1

#b1fddf on its own surface

1.11:1

#b1fddf on its dark surface

13.83:1

CSS3 live lab

Text font color

The quick brown fox

color: #b1fddf;
Background color
Panel with #b1fddf background
background-color: #b1fddf;
Text shadow — hex

Glowing headline

text-shadow: 2px 2px 8px #b1fddf;
Text shadow — RGB

Soft neon halo

text-shadow: 0 0 14px rgba(177, 253, 223, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(177, 253, 223, 0.45);
Border & gradient
Gradient panel
border: 3px solid #b1fddf;
background: linear-gradient(135deg, #b1fddf, #B1E8FD);
Gradient text

Gradient headline

background: linear-gradient(90deg, #b1fddf, #B1D5FD);
-webkit-background-clip: text;
color: transparent;
Focus ring
Focused control
outline: 2px solid #b1fddf;
outline-offset: 3px;
Underline & caret

Marked up text

text-decoration-color: #b1fddf;
caret-color: #b1fddf;
Left rule
Pull quote or callout
border-left: 4px solid #b1fddf;
Ring + tint
Selected chip
background: #E6FEF5;
box-shadow: inset 0 0 0 2px #b1fddf;
Conic badge
68%
background: conic-gradient(#b1fddf 68%, #e2e8f0 0);

Transparency

What each alpha value actually composites to. The top row is #b1fddf over white; the bottom row is the same alpha over a checkerboard, so you can see what survives on a photo or a video.

Bottom row of hexes is the flattened result over white — use those when a design tool refuses transparency, or when you need a solid fallback.

alpha in every syntaxclick to select
rgba(177, 253, 223, 0.5)
rgb(177 253 223 / 50%)
#b1fddf80
hsl(156 95% 84% / 50%)
color-mix(in srgb, #b1fddf 50%, transparent)
Alpha8-digit hexFlat on white
10%#b1fddf1a#F7FFFC
20%#b1fddf33#EFFFF9
40%#b1fddf66#E0FEF2
60%#b1fddf99#D0FEEC
80%#b1fddfcc#C1FDE5

Gradients from #b1fddf

Six recipes, each built from this hex and shown with the exact CSS that produced it.

Elevation
Same hue, three lightnesses — safe anywhere
background: linear-gradient(135deg, #EBFEF7, #b1fddf 45%, #037C4C);
Duotone
A short hue run reads richer than a flat fill
background: linear-gradient(120deg, #b1fddf, #93D7FC);
Complement sweep
Loud — keep it behind large type only
background: linear-gradient(90deg, #b1fddf, #FDB1CF);
Spotlight
Hero panels and app headers
background: radial-gradient(120% 120% at 20% 0%, #F0FFF9 0%, #b1fddf 45%, #037C4C 100%);
Soft wash
Section backgrounds that stay readable
background: linear-gradient(180deg, #F4FAF8, #ffffff);
Mesh
Ambient background, no image weight
background: radial-gradient(60% 60% at 15% 20%, #E3FEE3 0%, transparent 60%), radial-gradient(55% 55% at 85% 15%, #CFF5FE 0%, transparent 60%), radial-gradient(70% 70% at 50% 95%, #037C4C 0%, transparent 65%), #b1fddf;

Monochromatic scale

Palettes built from #b1fddf

Shades — darker

Tints — lighter

Tones — desaturated

Color harmonies

Nearest named colors

Ranked with CIEDE2000 across all 139 CSS keywords. Under ΔE 2 the eye stops telling them apart; over ΔE 10 they are plainly different colors.

#b1fddf in the real world

Where a color in this family tends to land, and the interface roles it is usually asked to play.

Industries
SustainabilityFinanceHealth and wellnessAgriculture
Common UI roles
SurfacesBadgesHighlightsEmpty states
Print note

Sits outside most CMYK gamuts — expect a duller press result, or specify a spot ink.

On screens

Holds up across typical panel gamma. Still worth checking on an uncalibrated laptop, where mid-tones shift most.

In dark mode

Usable as-is on a dark surface at 17.99:1.

Explore nearby colors

Small, deliberate steps away from this hex — useful when you are hunting for the version of a colour that finally feels right.

#b1fddf, answered

What color is #b1fddf?

#b1fddf is a light electric green, closest to Aqua Marine (ΔE2000 6.1). It sits at 156° on the hue wheel with 95% saturation and 84% lightness, which reads as cool.

What is the RGB value of #b1fddf?

rgb(177, 253, 223) — 177 red, 253 green and 223 blue out of 255, or 69.4% / 99.2% / 87.5% by channel.

What is #b1fddf in HSL and HSV?

hsl(156, 95%, 84%) and hsv(156, 30%, 99%). HSL is what CSS takes; HSV is what your design tool's picker shows, which is why the saturation numbers rarely match.

Is #b1fddf a light or a dark color?

It is a light color. Relative luminance is 0.8493 and perceived brightness is 90%, so black text on it reaches 17.99:1.

Should I use black or white text on #b1fddf?

Black. It scores 17.99:1 against #b1fddf, versus 1.17:1 for white — AAA at any size.

Is #b1fddf accessible on a white background?

#b1fddf on white scores 1.17:1, which fails WCAG AA at every size. Darken it to #038854 to reach 4.5:1, or #03653E for 7:1.

What is the complementary color of #b1fddf?

#FDB1CF sits directly opposite on the wheel. Softer options are the split-complements #FDB1F5 and #FDB9B1, which give the same contrast with far less vibration.

What colors go well with #b1fddf?

For interface work: #F4FAF8 as the surface, #C0EDDB for borders, #4B9B7B for secondary text, #CC0082 as an accent and #037C4C for hover and pressed states. For a palette, the analogous pair #B1FDB9 and #B1F5FD stays calm, while #FDB1CF is the loudest partner.

What is #b1fddf in CMYK for printing?

cmyk(30%, 0%, 12%, 1%). This is a screen-to-ink approximation — a color this saturated sits outside most CMYK gamuts and will print duller than it looks here.

Is #b1fddf warm or cool?

Cool — it scores 78 on a scale where 0 is the warmest orange and 100 the coolest azure. Nudged warmer it becomes #B1FDC3; nudged cooler, #B0FEFC.

Which Tailwind color is closest to #b1fddf?

The teal family — its 500 step is #14b8a6, ΔE2000 19.7 away. That is a visible difference, so define #b1fddf as a custom token rather than reaching for the built-in.

How do I use #b1fddf in Tailwind CSS?

Inline it as an arbitrary value with bg-[#b1fddf] or text-[#b1fddf], or register the whole ramp under theme.extend.colors.brand so you get bg-brand-500 and friends. The generated 50–950 scale on this page is ready to paste into your config.

What is #b1fddf with 50% opacity?

rgba(177, 253, 223, 0.5), or #b1fddf80 in eight-digit hex. Over white that composites to #D8FEEF; over black, #597F70.

Is #b1fddf a web-safe color?

No. The nearest web-safe colour is #99FFCC, ΔE2000 5.7 away. The palette only matters for legacy displays and some email clients now.

What does the color #b1fddf mean?

As a green, it reads safe, growing, natural. Green means go, well, and grown. It carries finance, sustainability and health with almost no explanation needed. At this chroma the effect is amplified — it will dominate whatever sits beside it.

What gradient works with #b1fddf?

The safest is same-hue elevation: linear-gradient(135deg, #EBFEF7, #b1fddf 45%, #037C4C). For more colour, a short hue run to #93D7FC keeps it rich without turning muddy.

Work with #b1fddf in the Color Lab

Every tool opens with this colour already loaded.

Every value on this page is computed from #b1fddf at request time — conversions, contrast ratios and ΔE distances are calculated, never looked up.