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green · neutral

#acec33

a balanced, electric green · neutral · closest name: Green Yellow

Token name suggestion: Atlas Fern

RGB
172, 236, 51
HSL
81°, 83%, 56%
CMYK
27, 0, 78, 8
Luminance
0.6900

#acec33 is a balanced electric green, 81° on the wheel and 42/100 on the cool side. Put black text on it (14.80:1). As text it scores 1.42:1 on white — use #577F0C instead. Nearest name is Green Yellow, nearest Tailwind family is lime.

hsl(81 83% 56%)rgb(172 236 51)Base step 500AAA inkNeutral

At a glance

Every number on this page in one read: what #acec33 is made of, how bright it looks, and which way it leans.

Hex
#acec33
Hue
81°
green
Saturation
83%
electric
Lightness
56%
balanced
Brightness
93%
HSV value
Perceived
80%
weighted brightness
Luminance
0.6900
WCAG relative
Temperature
Neutral
42/100 cool
Color family
Green
Tone
Electric
Best ink
Black
14.80:1
Closest name
Green Yellow
ΔE2000 4.1
Chroma
88.1
LCH, 0–130ish
OKLCH L
0.869
perceptual lightness
Tailwind
lime
500 · ΔE 8.1
Web-safe
#99FF33
nearest of 216
Where it sits
Hue81° of 360°
Saturation83%
Lightness56%
Saturation × lightness field

Left edge is grey, right edge is full chroma; top is white, bottom is black. The dot is #acec33.

Temperature
Warm ← → Cool42% cool

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

Luminance by channel
Red13%
Green87%
Blue0%

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

Every format

HEX#acec33
HEX (8-digit)#acec33ff
RGBrgb(172, 236, 51)
RGBArgba(172, 236, 51, 1)
HSLhsl(81, 83%, 56%)
HSV / HSBhsv(81, 78%, 93%)
HWBhwb(81 20% 7%)
CMYKcmyk(27%, 0%, 78%, 8%)
LABlab(86.5 -44.8 75.9)
LCHlch(86.5 88.1 120.5)
OKLCHoklch(0.869 0.211 127.7)
XYZ (D65)xyz(47.61, 69.00, 13.94)
Decimal11332659
Display P3color(display-p3 0.675 0.925 0.200)
Web-safe#99FF33

Copy-ready code

every platformclick to select
/* CSS */
color: #acec33;
background-color: #acec33;
/* CSS custom property */
--brand: #acec33;
/* Tailwind (arbitrary) */
class="text-[#acec33] bg-[#acec33]"
/* SCSS */
$brand: #acec33;
/* SwiftUI */
Color(red: 0.675, green: 0.925, blue: 0.200)
/* UIKit */
UIColor(red: 0.675, green: 0.925, blue: 0.200, alpha: 1)
/* Android XML */
<color name="brand">#ACEC33</color>
/* Android Compose */
Color(0xFFACEC33)
/* Flutter */
Color(0xFFACEC33)
/* Python / OpenCV (BGR) */
(51, 236, 172)
/* Python / PIL (RGB) */
(172, 236, 51)
/* Java AWT */
new Color(172, 236, 51)
/* .NET */
Color.FromArgb(255, 172, 236, 51)
/* OpenGL / Unity (0–1) */
(0.6745f, 0.9255f, 0.2000f, 1f)
/* LaTeX */
\definecolor{brand}{RGB}{172,236,51}
modern cssclick to select
/* mix without leaving CSS */
background: color-mix(in oklab, #acec33 85%, white);
border-color: color-mix(in oklab, #acec33 40%, transparent);
/* theme-aware in one line */
color: light-dark(#50750B, #E5EED3);
/* relative colour syntax */
--hover: hsl(from #acec33 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: #F9FCF2;
  --brand-100: #F3FAE6;
  --brand-200: #E5F6C6;
  --brand-300: #D5F598;
  --brand-400: #C0F165;
  --brand-500: #acec33;
  --brand-600: #9AE015;
  --brand-700: #80BB11;
  --brand-800: #66950E;
  --brand-900: #4C6C0E;
  --brand-950: #2F4309;
  --brand: #acec33;
  --brand-ink: #000000;
  --brand-surface: #F8FAF4;
  --brand-border: #DDEDC0;
  --brand-hover: #9EE615;
  --brand-pressed: #87C512;
}
@media (prefers-color-scheme: dark) {
  :root {
    --brand-surface: #1F2414;
    --brand-ink: #E5EED3;
  }
}
tailwind.config.jsclick to select
theme: {
  extend: {
    colors: {
      brand: {
        50: '#F9FCF2',
        100: '#F3FAE6',
        200: '#E5F6C6',
        300: '#D5F598',
        400: '#C0F165',
        500: '#acec33',
        600: '#9AE015',
        700: '#80BB11',
        800: '#66950E',
        900: '#4C6C0E',
        950: '#2F4309',
        DEFAULT: '#acec33',
      },
    },
  },
}
scss mapclick to select
$brand: (
  '50': #F9FCF2,
  '100': #F3FAE6,
  '200': #E5F6C6,
  '300': #D5F598,
  '400': #C0F165,
  '500': #acec33,
  '600': #9AE015,
  '700': #80BB11,
  '800': #66950E,
  '900': #4C6C0E,
  '950': #2F4309,
);
$brand-base: #acec33;
$brand-ink: #000000;

@function brand($step) { @return map-get($brand, $step); }
w3c design tokens (json)click to select
{
  "color": {
    "brand": {
      "50": { "$value": "#F9FCF2", "$type": "color" },
      "100": { "$value": "#F3FAE6", "$type": "color" },
      "200": { "$value": "#E5F6C6", "$type": "color" },
      "300": { "$value": "#D5F598", "$type": "color" },
      "400": { "$value": "#C0F165", "$type": "color" },
      "500": { "$value": "#acec33", "$type": "color" },
      "600": { "$value": "#9AE015", "$type": "color" },
      "700": { "$value": "#80BB11", "$type": "color" },
      "800": { "$value": "#66950E", "$type": "color" },
      "900": { "$value": "#4C6C0E", "$type": "color" },
      "950": { "$value": "#2F4309", "$type": "color" }
    },
    "brandInk": { "$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 #acec33 · 14.80:1
Use #000000AAA at every size.
Aa
12px
Aa
16px
Aa
24px
Aa
White text · 1.42:1
AA fail · AA large fail · AAA fail
Aa
Black text · 14.80:1 · recommended
AA pass · AA large pass · AAA pass
Reading the other direction: #acec33 as text scores 1.42:1 on white and 14.80:1 on black.
Best tinted ink on it, if plain black or white feels flat: #50750B at 3.80:1.

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
#577F0C · 4.72:1
AA on white−29% L
#577F0C
The quick fox
#415F09 · 7.33:1
AAA on white−36% L
#415F09
The quick fox
#acec33 · 14.80:1
AA on blackalready passes
#acec33
The quick fox
#acec33 · 14.80:1
AAA on blackalready passes
#acec33

Large text — 24px regular or 18.66px bold and above — only needs 3:1, so #6EA00F 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
#acec33 on white: 1.42:1
AA ✗ fail · AA-large · AAA
Aa
#acec33 on black: 14.80:1
AA ✓ pass · AA-large · AAA
Against the neutral ladder

Contrast is symmetric, so each row covers both directions: #acec33 as text on that neutral, and that neutral as text on #acec33.

NeutralRatioBoth directions
White1.42:1AaAa
Slate 501.36:1AaAa
Slate 1001.30:1AaAa
Slate 2001.15:1AaAa
Slate 3001.05:1AaAa
Slate 4001.81:1AaAa
Slate 5003.35:1AaAa
Slate 6005.34:1AaAa
Slate 7007.30:1AaAa
Slate 80010.31:1AaAa
Slate 90012.58:1AaAa
Black14.80:1AaAa
Colour vision deficiency
true color
protanopia · #F8DB00
deuteranopia · #EFD747
tritanopia · #B2E1CA

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. #acec33 is pinned to step 500; the rest hold its hue and let saturation ease off at the extremes so the pale end never turns neon.

#F9FCF2
#F3FAE6
#E5F6C6
#D5F598
#C0F165
#acec33
#9AE015
#80BB11
#66950E
#4C6C0E
#2F4309
Base = 500Lightest = 50 · #F9FCF2Darkest = 950 · #2F4309Text 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 0.053 127.7);
  --brand-100: oklch(0.94 0.084 127.7);
  --brand-200: oklch(0.88 0.127 127.7);
  --brand-300: oklch(0.80 0.165 127.7);
  --brand-400: oklch(0.72 0.194 127.7);
  --brand-500: oklch(0.64 0.211 127.7);
  --brand-600: oklch(0.56 0.211 127.7);
  --brand-700: oklch(0.48 0.198 127.7);
  --brand-800: oklch(0.40 0.177 127.7);
  --brand-900: oklch(0.32 0.148 127.7);
  --brand-950: oklch(0.24 0.116 127.7);
}

Colors that work with #acec33

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#F8FAF4
Tinted page background
Border#DDEDC0
Hairlines and dividers
Muted text#7F9B4B
Captions on the surface
Accent#412FF1
Second voice, not a rival
Dark variant#50750B
Hover, pressed, headers
Light variant#F5FDE8
Selected rows, tints
Dark surface#1F2414
Dark-mode background
Hover#9EE615
One step down in lightness
Pressed#87C512
Two steps down
Disabled#CBD4BB
Chroma pulled out
Focus ring#B7F83C
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 #acec33

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
  • Brand accents, badges and data highlights
  • Chart series and data categories
Use with care
  • Text of any size on white — fails WCAG AA
  • Full-page backgrounds — tiring over long sessions
  • 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 #50750B
Safe as a 1px border on white
No — use #6EA00F

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 mid lightness keeps it versatile in both themes.

Worth knowing

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

Reads as
  • FormalityLow
  • EnergyHigh
  • Weight44/100
  • TemperatureNeutral
  • ApproachabilityHigh

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#7333EC
Analogous left#ECD033
Analogous right#4FEC33
Split-complement 1#334FEC
Split-complement 2#D033EC
Triadic 1#33ACEC
Triadic 2#EC33AC
Tetradic#33ECD0
On the wheel
Base+30°−30°+120°+240°+180°81°

#acec33 sits at 81°. Every dot is a harmony position and links to its own page in the table alongside.

RGB percentages

Red67.5%
Green92.5%
Blue20.0%
R · 0–255
172
0xac
G · 0–255
236
0xec
B · 0–255
51
0x33

CMYK percentages

Cyan27.1%
Magenta0.0%
Yellow78.4%
Key (black)7.5%

Total ink coverage is 113%. Most commercial presses cap around 300% — above that, sheets stop drying properly.

Color previews

#acec33 text on a black background

contrast 14.80:1

Card sample

#acec33 text on a white background

contrast 1.42:1

Card sample

#acec33 on grey

1.30:1

#acec33 on its own surface

1.35:1

#acec33 on its dark surface

11.21:1

CSS3 live lab

Text font color

The quick brown fox

color: #acec33;
Background color
Panel with #acec33 background
background-color: #acec33;
Text shadow — hex

Glowing headline

text-shadow: 2px 2px 8px #acec33;
Text shadow — RGB

Soft neon halo

text-shadow: 0 0 14px rgba(172, 236, 51, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(172, 236, 51, 0.45);
Border & gradient
Gradient panel
border: 3px solid #acec33;
background: linear-gradient(135deg, #acec33, #33EC36);
Gradient text

Gradient headline

background: linear-gradient(90deg, #acec33, #33EC64);
-webkit-background-clip: text;
color: transparent;
Focus ring
Focused control
outline: 2px solid #acec33;
outline-offset: 3px;
Underline & caret

Marked up text

text-decoration-color: #acec33;
caret-color: #acec33;
Left rule
Pull quote or callout
border-left: 4px solid #acec33;
Ring + tint
Selected chip
background: #F5FDE8;
box-shadow: inset 0 0 0 2px #acec33;
Conic badge
68%
background: conic-gradient(#acec33 68%, #e2e8f0 0);

Transparency

What each alpha value actually composites to. The top row is #acec33 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(172, 236, 51, 0.5)
rgb(172 236 51 / 50%)
#acec3380
hsl(81 83% 56% / 50%)
color-mix(in srgb, #acec33 50%, transparent)
Alpha8-digit hexFlat on white
10%#acec331a#F7FDEB
20%#acec3333#EEFBD6
40%#acec3366#DEF7AD
60%#acec3399#CDF485
80%#acec33cc#BDF05C

Gradients from #acec33

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, #C3F16B, #acec33 45%, #50750B);
Duotone
A short hue run reads richer than a flat fill
background: linear-gradient(120deg, #acec33, #17E92B);
Complement sweep
Loud — keep it behind large type only
background: linear-gradient(90deg, #acec33, #7333EC);
Spotlight
Hero panels and app headers
background: radial-gradient(120% 120% at 20% 0%, #CEF487 0%, #acec33 45%, #50750B 100%);
Soft wash
Section backgrounds that stay readable
background: linear-gradient(180deg, #F8FAF4, #ffffff);
Mesh
Ambient background, no image weight
background: radial-gradient(60% 60% at 15% 20%, #F0CF62 0%, transparent 60%), radial-gradient(55% 55% at 85% 15%, #5AEF4F 0%, transparent 60%), radial-gradient(70% 70% at 50% 95%, #50750B 0%, transparent 65%), #acec33;

Monochromatic scale

Palettes built from #acec33

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.

#acec33 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
ButtonsLinksFocus statesCharts
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 14.80:1.

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.

#acec33, answered

What color is #acec33?

#acec33 is a balanced electric green, closest to Green Yellow (ΔE2000 4.1). It sits at 81° on the hue wheel with 83% saturation and 56% lightness, which reads as neutral.

What is the RGB value of #acec33?

rgb(172, 236, 51) — 172 red, 236 green and 51 blue out of 255, or 67.5% / 92.5% / 20% by channel.

What is #acec33 in HSL and HSV?

hsl(81, 83%, 56%) and hsv(81, 78%, 93%). HSL is what CSS takes; HSV is what your design tool's picker shows, which is why the saturation numbers rarely match.

Is #acec33 a light or a dark color?

It is a light color. Relative luminance is 0.6900 and perceived brightness is 80%, so black text on it reaches 14.80:1.

Should I use black or white text on #acec33?

Black. It scores 14.80:1 against #acec33, versus 1.42:1 for white — AAA at any size.

Is #acec33 accessible on a white background?

#acec33 on white scores 1.42:1, which fails WCAG AA at every size. Darken it to #577F0C to reach 4.5:1, or #415F09 for 7:1.

What is the complementary color of #acec33?

#7333EC sits directly opposite on the wheel. Softer options are the split-complements #334FEC and #D033EC, which give the same contrast with far less vibration.

What colors go well with #acec33?

For interface work: #F8FAF4 as the surface, #DDEDC0 for borders, #7F9B4B for secondary text, #412FF1 as an accent and #50750B for hover and pressed states. For a palette, the analogous pair #ECD033 and #4FEC33 stays calm, while #7333EC is the loudest partner.

What is #acec33 in CMYK for printing?

cmyk(27%, 0%, 78%, 8%). 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 #acec33 warm or cool?

Neutral — it scores 42 on a scale where 0 is the warmest orange and 100 the coolest azure. Nudged warmer it becomes #ECE833; nudged cooler, #67EE31.

Which Tailwind color is closest to #acec33?

The lime family — its 500 step is #84cc16, ΔE2000 8.1 away. That is a visible difference, so define #acec33 as a custom token rather than reaching for the built-in.

How do I use #acec33 in Tailwind CSS?

Inline it as an arbitrary value with bg-[#acec33] or text-[#acec33], 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 #acec33 with 50% opacity?

rgba(172, 236, 51, 0.5), or #acec3380 in eight-digit hex. Over white that composites to #D6F699; over black, #56761A.

Is #acec33 a web-safe color?

No. The nearest web-safe colour is #99FF33, ΔE2000 5.2 away. The palette only matters for legacy displays and some email clients now.

What does the color #acec33 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 #acec33?

The safest is same-hue elevation: linear-gradient(135deg, #C3F16B, #acec33 45%, #50750B). For more colour, a short hue run to #17E92B keeps it rich without turning muddy.

Work with #acec33 in the Color Lab

Every tool opens with this colour already loaded.

Every value on this page is computed from #acec33 at request time — conversions, contrast ratios and ΔE distances are calculated, never looked up.