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cyan · cool

#b1fcfd

a light, electric cyan · cool · closest name: Pale Turquoise

Token name suggestion: Linen Lagoon

RGB
177, 252, 253
HSL
181°, 95%, 84%
CMYK
30, 0, 0, 1
Luminance
0.8606

#b1fcfd is a light electric cyan, 181° on the wheel and 88/100 on the cool side. Put black text on it (18.21:1). As text it scores 1.15:1 on white — use #038183 instead. Nearest name is Pale Turquoise, nearest Tailwind family is cyan.

hsl(181 95% 84%)rgb(177 252 253)Base step 200AAA inkCool

At a glance

Every number on this page in one read: what #b1fcfd is made of, how bright it looks, and which way it leans.

Hex
#b1fcfd
Hue
181°
cyan
Saturation
95%
electric
Lightness
84%
light
Brightness
99%
HSV value
Perceived
91%
weighted brightness
Luminance
0.8606
WCAG relative
Temperature
Cool
88/100 cool
Color family
Cyan
Tone
Electric
Best ink
Black
18.21:1
Closest name
Pale Turquoise
ΔE2000 3.2
Chroma
24.0
LCH, 0–130ish
OKLCH L
0.943
perceptual lightness
Tailwind
cyan
500 · ΔE 20.4
Web-safe
#99FFFF
nearest of 216
Where it sits
Hue181° 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 #b1fcfd.

Temperature
Warm ← → Cool88% 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%
Green81%
Blue8%

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

Every format

HEX#b1fcfd
HEX (8-digit)#b1fcfdff
RGBrgb(177, 252, 253)
RGBArgba(177, 252, 253, 1)
HSLhsl(181, 95%, 84%)
HSV / HSBhsv(181, 30%, 99%)
HWBhwb(181 69% 1%)
CMYKcmyk(30%, 0%, 0%, 1%)
LABlab(94.3 -22.6 -7.9)
LCHlch(94.3 24.0 199.2)
OKLCHoklch(0.943 0.074 197.0)
XYZ (D65)xyz(70.67, 86.06, 105.80)
Decimal11664637
Display P3color(display-p3 0.694 0.988 0.992)
Web-safe#99FFFF

Copy-ready code

every platformclick to select
/* CSS */
color: #b1fcfd;
background-color: #b1fcfd;
/* CSS custom property */
--brand: #b1fcfd;
/* Tailwind (arbitrary) */
class="text-[#b1fcfd] bg-[#b1fcfd]"
/* SCSS */
$brand: #b1fcfd;
/* SwiftUI */
Color(red: 0.694, green: 0.988, blue: 0.992)
/* UIKit */
UIColor(red: 0.694, green: 0.988, blue: 0.992, alpha: 1)
/* Android XML */
<color name="brand">#B1FCFD</color>
/* Android Compose */
Color(0xFFB1FCFD)
/* Flutter */
Color(0xFFB1FCFD)
/* Python / OpenCV (BGR) */
(253, 252, 177)
/* Python / PIL (RGB) */
(177, 252, 253)
/* Java AWT */
new Color(177, 252, 253)
/* .NET */
Color.FromArgb(255, 177, 252, 253)
/* OpenGL / Unity (0–1) */
(0.6941f, 0.9882f, 0.9922f, 1f)
/* LaTeX */
\definecolor{brand}{RGB}{177,252,253}
modern cssclick to select
/* mix without leaving CSS */
background: color-mix(in oklab, #b1fcfd 85%, white);
border-color: color-mix(in oklab, #b1fcfd 40%, transparent);
/* theme-aware in one line */
color: light-dark(#037B7C, #D3EEEE);
/* relative colour syntax */
--hover: hsl(from #b1fcfd 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: #F1FDFD;
  --brand-100: #E4FBFB;
  --brand-200: #b1fcfd;
  --brand-300: #92FBFC;
  --brand-400: #5BF9FB;
  --brand-500: #24F7F9;
  --brand-600: #06ECEF;
  --brand-700: #05C4C7;
  --brand-800: #049D9F;
  --brand-900: #087173;
  --brand-950: #054748;
  --brand: #b1fcfd;
  --brand-ink: #000000;
  --brand-surface: #F4FAFA;
  --brand-border: #C0ECED;
  --brand-hover: #8EFBFC;
  --brand-pressed: #6BF9FB;
}
@media (prefers-color-scheme: dark) {
  :root {
    --brand-surface: #142424;
    --brand-ink: #D3EEEE;
  }
}
tailwind.config.jsclick to select
theme: {
  extend: {
    colors: {
      brand: {
        50: '#F1FDFD',
        100: '#E4FBFB',
        200: '#b1fcfd',
        300: '#92FBFC',
        400: '#5BF9FB',
        500: '#24F7F9',
        600: '#06ECEF',
        700: '#05C4C7',
        800: '#049D9F',
        900: '#087173',
        950: '#054748',
        DEFAULT: '#b1fcfd',
      },
    },
  },
}
scss mapclick to select
$brand: (
  '50': #F1FDFD,
  '100': #E4FBFB,
  '200': #b1fcfd,
  '300': #92FBFC,
  '400': #5BF9FB,
  '500': #24F7F9,
  '600': #06ECEF,
  '700': #05C4C7,
  '800': #049D9F,
  '900': #087173,
  '950': #054748,
);
$brand-base: #b1fcfd;
$brand-ink: #000000;

@function brand($step) { @return map-get($brand, $step); }
w3c design tokens (json)click to select
{
  "color": {
    "brand": {
      "50": { "$value": "#F1FDFD", "$type": "color" },
      "100": { "$value": "#E4FBFB", "$type": "color" },
      "200": { "$value": "#b1fcfd", "$type": "color" },
      "300": { "$value": "#92FBFC", "$type": "color" },
      "400": { "$value": "#5BF9FB", "$type": "color" },
      "500": { "$value": "#24F7F9", "$type": "color" },
      "600": { "$value": "#06ECEF", "$type": "color" },
      "700": { "$value": "#05C4C7", "$type": "color" },
      "800": { "$value": "#049D9F", "$type": "color" },
      "900": { "$value": "#087173", "$type": "color" },
      "950": { "$value": "#054748", "$type": "color" }
    },
    "brandInk": { "$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 #b1fcfd · 18.21:1
Use #000000AAA at every size.
Aa
12px
Aa
16px
Aa
24px
Aa
White text · 1.15:1
AA fail · AA large fail · AAA fail
Aa
Black text · 18.21:1 · recommended
AA pass · AA large pass · AAA pass
Reading the other direction: #b1fcfd as text scores 1.15:1 on white and 18.21:1 on black.
Best tinted ink on it, if plain black or white feels flat: #037B7C at 4.41:1.

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
#038183 · 4.70:1
AA on white−58% L
#038183
The quick fox
#025F60 · 7.48:1
AAA on white−65% L
#025F60
The quick fox
#b1fcfd · 18.21:1
AA on blackalready passes
#b1fcfd
The quick fox
#b1fcfd · 18.21:1
AAA on blackalready passes
#b1fcfd

Large text — 24px regular or 18.66px bold and above — only needs 3:1, so #04A3A6 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
#b1fcfd on white: 1.15:1
AA ✗ fail · AA-large · AAA
Aa
#b1fcfd on black: 18.21:1
AA ✓ pass · AA-large · AAA
Against the neutral ladder

Contrast is symmetric, so each row covers both directions: #b1fcfd as text on that neutral, and that neutral as text on #b1fcfd.

NeutralRatioBoth directions
White1.15:1AaAa
Slate 501.10:1AaAa
Slate 1001.05:1AaAa
Slate 2001.07:1AaAa
Slate 3001.29:1AaAa
Slate 4002.22:1AaAa
Slate 5004.13:1AaAa
Slate 6006.57:1AaAa
Slate 7008.98:1AaAa
Slate 80012.69:1AaAa
Slate 90015.48:1AaAa
Black18.21:1AaAa
Colour vision deficiency
true color
protanopia · #F2F5FD
deuteranopia · #E4EAFE
tritanopia · #95FFFC

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. #b1fcfd 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.

#F1FDFD
#E4FBFB
#b1fcfd
#92FBFC
#5BF9FB
#24F7F9
#06ECEF
#05C4C7
#049D9F
#087173
#054748
Base = 200Lightest = 50 · #F1FDFDDarkest = 950 · #054748Text 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 0.018 197.0);
  --brand-100: oklch(0.94 0.029 197.0);
  --brand-200: oklch(0.88 0.044 197.0);
  --brand-300: oklch(0.80 0.057 197.0);
  --brand-400: oklch(0.72 0.068 197.0);
  --brand-500: oklch(0.64 0.074 197.0);
  --brand-600: oklch(0.56 0.074 197.0);
  --brand-700: oklch(0.48 0.069 197.0);
  --brand-800: oklch(0.40 0.062 197.0);
  --brand-900: oklch(0.32 0.052 197.0);
  --brand-950: oklch(0.24 0.040 197.0);
}

Colors that work with #b1fcfd

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#F4FAFA
Tinted page background
Border#C0ECED
Hairlines and dividers
Muted text#4B9A9B
Captions on the surface
Accent#CC0030
Second voice, not a rival
Dark variant#037B7C
Hover, pressed, headers
Light variant#E6FEFE
Selected rows, tints
Dark surface#142424
Dark-mode background
Hover#8EFBFC
One step down in lightness
Pressed#6BF9FB
Two steps down
Disabled#F3F7F7
Chroma pulled out
Focus ring#C3FEFF
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 #b1fcfd

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
  • Thin strokes and 1px borders — they disappear on light UI
  • 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 #037B7C
Safe as a 1px border on white
No — use #04A3A6

Meaning and mood

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

cleantechnicalfreshclinical

Cyan reads as water, air and infrastructure: cool, hygienic, engineered.

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

At high lightness it disappears into white surfaces and thin strokes vanish entirely.

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#FDB2B1
Analogous left#B1FDD8
Analogous right#B1D6FD
Split-complement 1#FDB1D6
Split-complement 2#FDD8B1
Triadic 1#FDB1FC
Triadic 2#FCFDB1
Tetradic#D8B1FD
On the wheel
Base+30°−30°+120°+240°+180°181°

#b1fcfd sits at 181°. Every dot is a harmony position and links to its own page in the table alongside.

RGB percentages

Red69.4%
Green98.8%
Blue99.2%
R · 0–255
177
0xb1
G · 0–255
252
0xfc
B · 0–255
253
0xfd

CMYK percentages

Cyan30.0%
Magenta0.4%
Yellow0.0%
Key (black)0.8%

Total ink coverage is 31%. Most commercial presses cap around 300% — above that, sheets stop drying properly.

Color previews

#b1fcfd text on a black background

contrast 18.21:1

Card sample

#b1fcfd text on a white background

contrast 1.15:1

Card sample

#b1fcfd on grey

1.05:1

#b1fcfd on its own surface

1.09:1

#b1fcfd on its dark surface

13.93:1

CSS3 live lab

Text font color

The quick brown fox

color: #b1fcfd;
Background color
Panel with #b1fcfd background
background-color: #b1fcfd;
Text shadow — hex

Glowing headline

text-shadow: 2px 2px 8px #b1fcfd;
Text shadow — RGB

Soft neon halo

text-shadow: 0 0 14px rgba(177, 252, 253, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(177, 252, 253, 0.45);
Border & gradient
Gradient panel
border: 3px solid #b1fcfd;
background: linear-gradient(135deg, #b1fcfd, #B1C9FD);
Gradient text

Gradient headline

background: linear-gradient(90deg, #b1fcfd, #B1B6FD);
-webkit-background-clip: text;
color: transparent;
Focus ring
Focused control
outline: 2px solid #b1fcfd;
outline-offset: 3px;
Underline & caret

Marked up text

text-decoration-color: #b1fcfd;
caret-color: #b1fcfd;
Left rule
Pull quote or callout
border-left: 4px solid #b1fcfd;
Ring + tint
Selected chip
background: #E6FEFE;
box-shadow: inset 0 0 0 2px #b1fcfd;
Conic badge
68%
background: conic-gradient(#b1fcfd 68%, #e2e8f0 0);

Transparency

What each alpha value actually composites to. The top row is #b1fcfd 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, 252, 253, 0.5)
rgb(177 252 253 / 50%)
#b1fcfd80
hsl(181 95% 84% / 50%)
color-mix(in srgb, #b1fcfd 50%, transparent)
Alpha8-digit hexFlat on white
10%#b1fcfd1a#F7FFFF
20%#b1fcfd33#EFFEFF
40%#b1fcfd66#E0FEFE
60%#b1fcfd99#D0FDFE
80%#b1fcfdcc#C1FDFD

Gradients from #b1fcfd

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, #EBFEFE, #b1fcfd 45%, #037B7C);
Duotone
A short hue run reads richer than a flat fill
background: linear-gradient(120deg, #b1fcfd, #93ACFC);
Complement sweep
Loud — keep it behind large type only
background: linear-gradient(90deg, #b1fcfd, #FDB2B1);
Spotlight
Hero panels and app headers
background: radial-gradient(120% 120% at 20% 0%, #F0FEFF 0%, #b1fcfd 45%, #037B7C 100%);
Soft wash
Section backgrounds that stay readable
background: linear-gradient(180deg, #F4FAFA, #ffffff);
Mesh
Ambient background, no image weight
background: radial-gradient(60% 60% at 15% 20%, #E3FEEF 0%, transparent 60%), radial-gradient(55% 55% at 85% 15%, #CFE2FE 0%, transparent 60%), radial-gradient(70% 70% at 50% 95%, #037B7C 0%, transparent 65%), #b1fcfd;

Monochromatic scale

Palettes built from #b1fcfd

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.

#b1fcfd in the real world

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

Industries
TechnologyTravelHealthcareMedia
Common UI roles
SurfacesBadgesHighlightsEmpty states
Print note

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

On screens

Very light values are indistinguishable from white on a dim phone screen outdoors. Give it a border if the boundary matters.

In dark mode

Usable as-is on a dark surface at 18.21:1.

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.

#b1fcfd, answered

What color is #b1fcfd?

#b1fcfd is a light electric cyan, closest to Pale Turquoise (ΔE2000 3.2). It sits at 181° on the hue wheel with 95% saturation and 84% lightness, which reads as cool.

What is the RGB value of #b1fcfd?

rgb(177, 252, 253) — 177 red, 252 green and 253 blue out of 255, or 69.4% / 98.8% / 99.2% by channel.

What is #b1fcfd in HSL and HSV?

hsl(181, 95%, 84%) and hsv(181, 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 #b1fcfd a light or a dark color?

It is a light color. Relative luminance is 0.8606 and perceived brightness is 91%, so black text on it reaches 18.21:1.

Should I use black or white text on #b1fcfd?

Black. It scores 18.21:1 against #b1fcfd, versus 1.15:1 for white — AAA at any size.

Is #b1fcfd accessible on a white background?

#b1fcfd on white scores 1.15:1, which fails WCAG AA at every size. Darken it to #038183 to reach 4.5:1, or #025F60 for 7:1.

What is the complementary color of #b1fcfd?

#FDB2B1 sits directly opposite on the wheel. Softer options are the split-complements #FDB1D6 and #FDD8B1, which give the same contrast with far less vibration.

What colors go well with #b1fcfd?

For interface work: #F4FAFA as the surface, #C0ECED for borders, #4B9A9B for secondary text, #CC0030 as an accent and #037B7C for hover and pressed states. For a palette, the analogous pair #B1FDD8 and #B1D6FD stays calm, while #FDB2B1 is the loudest partner.

What is #b1fcfd in CMYK for printing?

cmyk(30%, 0%, 0%, 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 #b1fcfd warm or cool?

Cool — it scores 88 on a scale where 0 is the warmest orange and 100 the coolest azure. Nudged warmer it becomes #B1FDE2; nudged cooler, #B0E0FE.

Which Tailwind color is closest to #b1fcfd?

The cyan family — its 500 step is #06b6d4, ΔE2000 20.4 away. That is a visible difference, so define #b1fcfd as a custom token rather than reaching for the built-in.

How do I use #b1fcfd in Tailwind CSS?

Inline it as an arbitrary value with bg-[#b1fcfd] or text-[#b1fcfd], 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 #b1fcfd with 50% opacity?

rgba(177, 252, 253, 0.5), or #b1fcfd80 in eight-digit hex. Over white that composites to #D8FEFE; over black, #597E7F.

Is #b1fcfd a web-safe color?

No. The nearest web-safe colour is #99FFFF, ΔE2000 3.4 away. The palette only matters for legacy displays and some email clients now.

What does the color #b1fcfd mean?

As a cyan, it reads clean, technical, fresh. Cyan reads as water, air and infrastructure: cool, hygienic, engineered. At this chroma the effect is amplified — it will dominate whatever sits beside it.

What gradient works with #b1fcfd?

The safest is same-hue elevation: linear-gradient(135deg, #EBFEFE, #b1fcfd 45%, #037B7C). For more colour, a short hue run to #93ACFC keeps it rich without turning muddy.

Work with #b1fcfd in the Color Lab

Every tool opens with this colour already loaded.

Every value on this page is computed from #b1fcfd at request time — conversions, contrast ratios and ΔE distances are calculated, never looked up.