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green · cool

#a4fdda

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

Token name suggestion: Drift Moss

RGB
164, 253, 218
HSL
156°, 96%, 82%
CMYK
35, 0, 14, 1
Luminance
0.8321

#a4fdda is a light electric green, 156° on the wheel and 78/100 on the cool side. Put black text on it (17.64:1). As text it scores 1.19:1 on white — use #038652 instead. Nearest name is Aqua Marine, nearest Tailwind family is teal.

hsl(156 96% 82%)rgb(164 253 218)Base step 300AAA inkCool

At a glance

Every number on this page in one read: what #a4fdda is made of, how bright it looks, and which way it leans.

Hex
#a4fdda
Hue
156°
green
Saturation
96%
electric
Lightness
82%
light
Brightness
99%
HSV value
Perceived
89%
weighted brightness
Luminance
0.8321
WCAG relative
Temperature
Cool
78/100 cool
Color family
Green
Tone
Electric
Best ink
Black
17.64:1
Closest name
Aqua Marine
ΔE2000 4.1
Chroma
35.1
LCH, 0–130ish
OKLCH L
0.928
perceptual lightness
Tailwind
teal
500 · ΔE 19.1
Web-safe
#99FFCC
nearest of 216
Where it sits
Hue156° of 360°
Saturation96%
Lightness82%
Saturation × lightness field

Left edge is grey, right edge is full chroma; top is white, bottom is black. The dot is #a4fdda.

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
Red9%
Green84%
Blue6%

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

Every format

HEX#a4fdda
HEX (8-digit)#a4fddaff
RGBrgb(164, 253, 218)
RGBArgba(164, 253, 218, 1)
HSLhsl(156, 96%, 82%)
HSV / HSBhsv(156, 35%, 99%)
HWBhwb(156 64% 1%)
CMYKcmyk(35%, 0%, 14%, 1%)
LABlab(93.1 -34.1 8.3)
LCHlch(93.1 35.1 166.2)
OKLCHoklch(0.928 0.099 167.4)
XYZ (D65)xyz(63.09, 83.20, 79.05)
Decimal10812890
Display P3color(display-p3 0.643 0.992 0.855)
Web-safe#99FFCC

Copy-ready code

every platformclick to select
/* CSS */
color: #a4fdda;
background-color: #a4fdda;
/* CSS custom property */
--brand: #a4fdda;
/* Tailwind (arbitrary) */
class="text-[#a4fdda] bg-[#a4fdda]"
/* SCSS */
$brand: #a4fdda;
/* SwiftUI */
Color(red: 0.643, green: 0.992, blue: 0.855)
/* UIKit */
UIColor(red: 0.643, green: 0.992, blue: 0.855, alpha: 1)
/* Android XML */
<color name="brand">#A4FDDA</color>
/* Android Compose */
Color(0xFFA4FDDA)
/* Flutter */
Color(0xFFA4FDDA)
/* Python / OpenCV (BGR) */
(218, 253, 164)
/* Python / PIL (RGB) */
(164, 253, 218)
/* Java AWT */
new Color(164, 253, 218)
/* .NET */
Color.FromArgb(255, 164, 253, 218)
/* OpenGL / Unity (0–1) */
(0.6431f, 0.9922f, 0.8549f, 1f)
/* LaTeX */
\definecolor{brand}{RGB}{164,253,218}
modern cssclick to select
/* mix without leaving CSS */
background: color-mix(in oklab, #a4fdda 85%, white);
border-color: color-mix(in oklab, #a4fdda 40%, transparent);
/* theme-aware in one line */
color: light-dark(#037D4D, #D3EEE3);
/* relative colour syntax */
--hover: hsl(from #a4fdda 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: #E4FCF2;
  --brand-200: #C1FAE4;
  --brand-300: #a4fdda;
  --brand-400: #5AFBBC;
  --brand-500: #23FAA6;
  --brand-600: #05F093;
  --brand-700: #04C87B;
  --brand-800: #04A062;
  --brand-900: #077349;
  --brand-950: #05482D;
  --brand: #a4fdda;
  --brand-ink: #000000;
  --brand-surface: #F4FAF8;
  --brand-border: #C0EDDB;
  --brand-hover: #81FCCC;
  --brand-pressed: #5EFBBE;
}
@media (prefers-color-scheme: dark) {
  :root {
    --brand-surface: #14241E;
    --brand-ink: #D3EEE3;
  }
}
tailwind.config.jsclick to select
theme: {
  extend: {
    colors: {
      brand: {
        50: '#F1FDF9',
        100: '#E4FCF2',
        200: '#C1FAE4',
        300: '#a4fdda',
        400: '#5AFBBC',
        500: '#23FAA6',
        600: '#05F093',
        700: '#04C87B',
        800: '#04A062',
        900: '#077349',
        950: '#05482D',
        DEFAULT: '#a4fdda',
      },
    },
  },
}
scss mapclick to select
$brand: (
  '50': #F1FDF9,
  '100': #E4FCF2,
  '200': #C1FAE4,
  '300': #a4fdda,
  '400': #5AFBBC,
  '500': #23FAA6,
  '600': #05F093,
  '700': #04C87B,
  '800': #04A062,
  '900': #077349,
  '950': #05482D,
);
$brand-base: #a4fdda;
$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": "#E4FCF2", "$type": "color" },
      "200": { "$value": "#C1FAE4", "$type": "color" },
      "300": { "$value": "#a4fdda", "$type": "color" },
      "400": { "$value": "#5AFBBC", "$type": "color" },
      "500": { "$value": "#23FAA6", "$type": "color" },
      "600": { "$value": "#05F093", "$type": "color" },
      "700": { "$value": "#04C87B", "$type": "color" },
      "800": { "$value": "#04A062", "$type": "color" },
      "900": { "$value": "#077349", "$type": "color" },
      "950": { "$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 #a4fdda · 17.64:1
Use #000000AAA at every size.
Aa
12px
Aa
16px
Aa
24px
Aa
White text · 1.19:1
AA fail · AA large fail · AAA fail
Aa
Black text · 17.64:1 · recommended
AA pass · AA large pass · AAA pass
Reading the other direction: #a4fdda as text scores 1.19:1 on white and 17.64:1 on black.
Best tinted ink on it, if plain black or white feels flat: #037D4D at 4.36:1.

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
#038652 · 4.63:1
AA on white−55% L
#038652
The quick fox
#02633D · 7.36:1
AAA on white−62% L
#02633D
The quick fox
#a4fdda · 17.64:1
AA on blackalready passes
#a4fdda
The quick fox
#a4fdda · 17.64:1
AAA on blackalready passes
#a4fdda

Large text — 24px regular or 18.66px bold and above — only needs 3:1, so #04A968 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
#a4fdda on white: 1.19:1
AA ✗ fail · AA-large · AAA
Aa
#a4fdda on black: 17.64:1
AA ✓ pass · AA-large · AAA
Against the neutral ladder

Contrast is symmetric, so each row covers both directions: #a4fdda as text on that neutral, and that neutral as text on #a4fdda.

NeutralRatioBoth directions
White1.19:1AaAa
Slate 501.14:1AaAa
Slate 1001.09:1AaAa
Slate 2001.04:1AaAa
Slate 3001.25:1AaAa
Slate 4002.15:1AaAa
Slate 5004.00:1AaAa
Slate 6006.37:1AaAa
Slate 7008.70:1AaAa
Slate 80012.29:1AaAa
Slate 90015.00:1AaAa
Black17.64:1AaAa
Colour vision deficiency
true color
protanopia · #F9F2D8
deuteranopia · #EAE7DC
tritanopia · #8DFEF3

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. #a4fdda is pinned to step 300; the rest hold its hue and let saturation ease off at the extremes so the pale end never turns neon.

#F1FDF9
#E4FCF2
#C1FAE4
#a4fdda
#5AFBBC
#23FAA6
#05F093
#04C87B
#04A062
#077349
#05482D
Base = 300Lightest = 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 0.025 167.4);
  --brand-100: oklch(0.94 0.040 167.4);
  --brand-200: oklch(0.88 0.059 167.4);
  --brand-300: oklch(0.80 0.077 167.4);
  --brand-400: oklch(0.72 0.091 167.4);
  --brand-500: oklch(0.64 0.099 167.4);
  --brand-600: oklch(0.56 0.099 167.4);
  --brand-700: oklch(0.48 0.093 167.4);
  --brand-800: oklch(0.40 0.083 167.4);
  --brand-900: oklch(0.32 0.069 167.4);
  --brand-950: oklch(0.24 0.054 167.4);
}

Colors that work with #a4fdda

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#CC0084
Second voice, not a rival
Dark variant#037D4D
Hover, pressed, headers
Light variant#E6FEF5
Selected rows, tints
Dark surface#14241E
Dark-mode background
Hover#81FCCC
One step down in lightness
Pressed#5EFBBE
Two steps down
Disabled#F3F7F5
Chroma pulled out
Focus ring#B7FFE3
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 #a4fdda

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 #037D4D
Safe as a 1px border on white
No — use #04A968

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
  • Weight18/100
  • 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#FDA4C7
Analogous left#A4FDAE
Analogous right#A4F4FD
Split-complement 1#FDA4F4
Split-complement 2#FDAEA4
Triadic 1#DAA4FD
Triadic 2#FDDAA4
Tetradic#AEA4FD
On the wheel
Base+30°−30°+120°+240°+180°156°

#a4fdda sits at 156°. Every dot is a harmony position and links to its own page in the table alongside.

RGB percentages

Red64.3%
Green99.2%
Blue85.5%
R · 0–255
164
0xa4
G · 0–255
253
0xfd
B · 0–255
218
0xda

CMYK percentages

Cyan35.2%
Magenta0.0%
Yellow13.8%
Key (black)0.8%

Total ink coverage is 50%. Most commercial presses cap around 300% — above that, sheets stop drying properly.

Color previews

#a4fdda text on a black background

contrast 17.64:1

Card sample

#a4fdda text on a white background

contrast 1.19:1

Card sample

#a4fdda on grey

1.09:1

#a4fdda on its own surface

1.13:1

#a4fdda on its dark surface

13.56:1

CSS3 live lab

Text font color

The quick brown fox

color: #a4fdda;
Background color
Panel with #a4fdda background
background-color: #a4fdda;
Text shadow — hex

Glowing headline

text-shadow: 2px 2px 8px #a4fdda;
Text shadow — RGB

Soft neon halo

text-shadow: 0 0 14px rgba(164, 253, 218, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(164, 253, 218, 0.45);
Border & gradient
Gradient panel
border: 3px solid #a4fdda;
background: linear-gradient(135deg, #a4fdda, #A4E5FD);
Gradient text

Gradient headline

background: linear-gradient(90deg, #a4fdda, #A4CFFD);
-webkit-background-clip: text;
color: transparent;
Focus ring
Focused control
outline: 2px solid #a4fdda;
outline-offset: 3px;
Underline & caret

Marked up text

text-decoration-color: #a4fdda;
caret-color: #a4fdda;
Left rule
Pull quote or callout
border-left: 4px solid #a4fdda;
Ring + tint
Selected chip
background: #E6FEF5;
box-shadow: inset 0 0 0 2px #a4fdda;
Conic badge
68%
background: conic-gradient(#a4fdda 68%, #e2e8f0 0);

Transparency

What each alpha value actually composites to. The top row is #a4fdda 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(164, 253, 218, 0.5)
rgb(164 253 218 / 50%)
#a4fdda80
hsl(156 96% 82% / 50%)
color-mix(in srgb, #a4fdda 50%, transparent)
Alpha8-digit hexFlat on white
10%#a4fdda1a#F6FFFB
20%#a4fdda33#EDFFF8
40%#a4fdda66#DBFEF0
60%#a4fdda99#C8FEE9
80%#a4fddacc#B6FDE1

Gradients from #a4fdda

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, #E0FEF2, #a4fdda 45%, #037D4D);
Duotone
A short hue run reads richer than a flat fill
background: linear-gradient(120deg, #a4fdda, #86D2FC);
Complement sweep
Loud — keep it behind large type only
background: linear-gradient(90deg, #a4fdda, #FDA4C7);
Spotlight
Hero panels and app headers
background: radial-gradient(120% 120% at 20% 0%, #F0FFF9 0%, #a4fdda 45%, #037D4D 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%, #D6FED7 0%, transparent 60%), radial-gradient(55% 55% at 85% 15%, #C2F2FE 0%, transparent 60%), radial-gradient(70% 70% at 50% 95%, #037D4D 0%, transparent 65%), #a4fdda;

Monochromatic scale

Palettes built from #a4fdda

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.

#a4fdda 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 17.64:1.

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.

#a4fdda, answered

What color is #a4fdda?

#a4fdda is a light electric green, closest to Aqua Marine (ΔE2000 4.1). It sits at 156° on the hue wheel with 96% saturation and 82% lightness, which reads as cool.

What is the RGB value of #a4fdda?

rgb(164, 253, 218) — 164 red, 253 green and 218 blue out of 255, or 64.3% / 99.2% / 85.5% by channel.

What is #a4fdda in HSL and HSV?

hsl(156, 96%, 82%) and hsv(156, 35%, 99%). HSL is what CSS takes; HSV is what your design tool's picker shows, which is why the saturation numbers rarely match.

Is #a4fdda a light or a dark color?

It is a light color. Relative luminance is 0.8321 and perceived brightness is 89%, so black text on it reaches 17.64:1.

Should I use black or white text on #a4fdda?

Black. It scores 17.64:1 against #a4fdda, versus 1.19:1 for white — AAA at any size.

Is #a4fdda accessible on a white background?

#a4fdda on white scores 1.19:1, which fails WCAG AA at every size. Darken it to #038652 to reach 4.5:1, or #02633D for 7:1.

What is the complementary color of #a4fdda?

#FDA4C7 sits directly opposite on the wheel. Softer options are the split-complements #FDA4F4 and #FDAEA4, which give the same contrast with far less vibration.

What colors go well with #a4fdda?

For interface work: #F4FAF8 as the surface, #C0EDDB for borders, #4B9B7B for secondary text, #CC0084 as an accent and #037D4D for hover and pressed states. For a palette, the analogous pair #A4FDAE and #A4F4FD stays calm, while #FDA4C7 is the loudest partner.

What is #a4fdda in CMYK for printing?

cmyk(35%, 0%, 14%, 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 #a4fdda 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 #A4FDB9; nudged cooler, #A3FEFC.

Which Tailwind color is closest to #a4fdda?

The teal family — its 500 step is #14b8a6, ΔE2000 19.1 away. That is a visible difference, so define #a4fdda as a custom token rather than reaching for the built-in.

How do I use #a4fdda in Tailwind CSS?

Inline it as an arbitrary value with bg-[#a4fdda] or text-[#a4fdda], 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 #a4fdda with 50% opacity?

rgba(164, 253, 218, 0.5), or #a4fdda80 in eight-digit hex. Over white that composites to #D2FEED; over black, #527F6D.

Is #a4fdda a web-safe color?

No. The nearest web-safe colour is #99FFCC, ΔE2000 4 away. The palette only matters for legacy displays and some email clients now.

What does the color #a4fdda 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 #a4fdda?

The safest is same-hue elevation: linear-gradient(135deg, #E0FEF2, #a4fdda 45%, #037D4D). For more colour, a short hue run to #86D2FC keeps it rich without turning muddy.

Work with #a4fdda in the Color Lab

Every tool opens with this colour already loaded.

Every value on this page is computed from #a4fdda at request time — conversions, contrast ratios and ΔE distances are calculated, never looked up.