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green · warm

#a5ce13

a dark, electric green · warm · closest name: Yellow Green

Token name suggestion: Slate Jade

RGB
165, 206, 19
HSL
73°, 83%, 44%
CMYK
20, 0, 91, 19
Luminance
0.5219

#a5ce13 is a dark electric green, 73° on the wheel and 36/100 on the cool side. Put black text on it (11.44:1). As text it scores 1.84:1 on white — use #657F0C instead. Nearest name is Yellow Green, nearest Tailwind family is lime.

hsl(73 83% 44%)rgb(165 206 19)Base step 600AAA inkWarm

At a glance

Every number on this page in one read: what #a5ce13 is made of, how bright it looks, and which way it leans.

Hex
#a5ce13
Hue
73°
green
Saturation
83%
electric
Lightness
44%
dark
Brightness
81%
HSV value
Perceived
71%
weighted brightness
Luminance
0.5219
WCAG relative
Temperature
Warm
36/100 cool
Color family
Green
Tone
Electric
Best ink
Black
11.44:1
Closest name
Yellow Green
ΔE2000 3.2
Chroma
82.7
LCH, 0–130ish
OKLCH L
0.793
perceptual lightness
Tailwind
lime
500 · ΔE 5.3
Web-safe
#99CC00
nearest of 216
Where it sits
Hue73° of 360°
Saturation83%
Lightness44%
Saturation × lightness field

Left edge is grey, right edge is full chroma; top is white, bottom is black. The dot is #a5ce13.

Temperature
Warm ← → Cool36% cool

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

Luminance by channel
Red15%
Green85%
Blue0%

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

Every format

HEX#a5ce13
HEX (8-digit)#a5ce13ff
RGBrgb(165, 206, 19)
RGBArgba(165, 206, 19, 1)
HSLhsl(73, 83%, 44%)
HSV / HSBhsv(73, 91%, 81%)
HWBhwb(73 7% 19%)
CMYKcmyk(20%, 0%, 91%, 19%)
LABlab(77.4 -35.2 74.9)
LCHlch(77.4 82.7 115.2)
OKLCHoklch(0.793 0.191 123.1)
XYZ (D65)xyz(37.71, 52.19, 8.70)
Decimal10866195
Display P3color(display-p3 0.647 0.808 0.075)
Web-safe#99CC00

Copy-ready code

every platformclick to select
/* CSS */
color: #a5ce13;
background-color: #a5ce13;
/* CSS custom property */
--brand: #a5ce13;
/* Tailwind (arbitrary) */
class="text-[#a5ce13] bg-[#a5ce13]"
/* SCSS */
$brand: #a5ce13;
/* SwiftUI */
Color(red: 0.647, green: 0.808, blue: 0.075)
/* UIKit */
UIColor(red: 0.647, green: 0.808, blue: 0.075, alpha: 1)
/* Android XML */
<color name="brand">#A5CE13</color>
/* Android Compose */
Color(0xFFA5CE13)
/* Flutter */
Color(0xFFA5CE13)
/* Python / OpenCV (BGR) */
(19, 206, 165)
/* Python / PIL (RGB) */
(165, 206, 19)
/* Java AWT */
new Color(165, 206, 19)
/* .NET */
Color.FromArgb(255, 165, 206, 19)
/* OpenGL / Unity (0–1) */
(0.6471f, 0.8078f, 0.0745f, 1f)
/* LaTeX */
\definecolor{brand}{RGB}{165,206,19}
modern cssclick to select
/* mix without leaving CSS */
background: color-mix(in oklab, #a5ce13 85%, white);
border-color: color-mix(in oklab, #a5ce13 40%, transparent);
/* theme-aware in one line */
color: light-dark(#5D750B, #E8EED3);
/* relative colour syntax */
--hover: hsl(from #a5ce13 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: #FAFCF2;
  --brand-100: #F5FAE6;
  --brand-200: #EBF6C6;
  --brand-300: #E1F698;
  --brand-400: #D2F165;
  --brand-500: #C3EC32;
  --brand-600: #a5ce13;
  --brand-700: #95BB11;
  --brand-800: #78950E;
  --brand-900: #576C0E;
  --brand-950: #374309;
  --brand: #a5ce13;
  --brand-ink: #000000;
  --brand-surface: #F9FAF4;
  --brand-border: #E3EDC0;
  --brand-hover: #8BAD10;
  --brand-pressed: #708D0D;
}
@media (prefers-color-scheme: dark) {
  :root {
    --brand-surface: #212414;
    --brand-ink: #E8EED3;
  }
}
tailwind.config.jsclick to select
theme: {
  extend: {
    colors: {
      brand: {
        50: '#FAFCF2',
        100: '#F5FAE6',
        200: '#EBF6C6',
        300: '#E1F698',
        400: '#D2F165',
        500: '#C3EC32',
        600: '#a5ce13',
        700: '#95BB11',
        800: '#78950E',
        900: '#576C0E',
        950: '#374309',
        DEFAULT: '#a5ce13',
      },
    },
  },
}
scss mapclick to select
$brand: (
  '50': #FAFCF2,
  '100': #F5FAE6,
  '200': #EBF6C6,
  '300': #E1F698,
  '400': #D2F165,
  '500': #C3EC32,
  '600': #a5ce13,
  '700': #95BB11,
  '800': #78950E,
  '900': #576C0E,
  '950': #374309,
);
$brand-base: #a5ce13;
$brand-ink: #000000;

@function brand($step) { @return map-get($brand, $step); }
w3c design tokens (json)click to select
{
  "color": {
    "brand": {
      "50": { "$value": "#FAFCF2", "$type": "color" },
      "100": { "$value": "#F5FAE6", "$type": "color" },
      "200": { "$value": "#EBF6C6", "$type": "color" },
      "300": { "$value": "#E1F698", "$type": "color" },
      "400": { "$value": "#D2F165", "$type": "color" },
      "500": { "$value": "#C3EC32", "$type": "color" },
      "600": { "$value": "#a5ce13", "$type": "color" },
      "700": { "$value": "#95BB11", "$type": "color" },
      "800": { "$value": "#78950E", "$type": "color" },
      "900": { "$value": "#576C0E", "$type": "color" },
      "950": { "$value": "#374309", "$type": "color" }
    },
    "brandInk": { "$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 #a5ce13 · 11.44:1
Use #000000AAA at every size.
Aa
12px
Aa
16px
Aa
24px
Aa
White text · 1.84:1
AA fail · AA large fail · AAA fail
Aa
Black text · 11.44:1 · recommended
AA pass · AA large pass · AAA pass
Reading the other direction: #a5ce13 as text scores 1.84:1 on white and 11.44:1 on black.
Best tinted ink on it, if plain black or white feels flat: #5D750B at 2.85:1.

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
#657F0C · 4.57:1
AA on white−17% L
#657F0C
The quick fox
#4B5E09 · 7.23:1
AAA on white−24% L
#4B5E09
The quick fox
#a5ce13 · 11.44:1
AA on blackalready passes
#a5ce13
The quick fox
#a5ce13 · 11.44:1
AAA on blackalready passes
#a5ce13

Large text — 24px regular or 18.66px bold and above — only needs 3:1, so #7F9F0F 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
#a5ce13 on white: 1.84:1
AA ✗ fail · AA-large · AAA
Aa
#a5ce13 on black: 11.44:1
AA ✓ pass · AA-large · AAA
Against the neutral ladder

Contrast is symmetric, so each row covers both directions: #a5ce13 as text on that neutral, and that neutral as text on #a5ce13.

NeutralRatioBoth directions
White1.84:1AaAa
Slate 501.75:1AaAa
Slate 1001.68:1AaAa
Slate 2001.49:1AaAa
Slate 3001.24:1AaAa
Slate 4001.40:1AaAa
Slate 5002.59:1AaAa
Slate 6004.13:1AaAa
Slate 7005.64:1AaAa
Slate 8007.97:1AaAa
Slate 9009.72:1AaAa
Black11.44:1AaAa
Colour vision deficiency
true color
protanopia · #DBC000
deuteranopia · #D5BF2F
tritanopia · #AEC3AF

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. #a5ce13 is pinned to step 600; the rest hold its hue and let saturation ease off at the extremes so the pale end never turns neon.

#FAFCF2
#F5FAE6
#EBF6C6
#E1F698
#D2F165
#C3EC32
#a5ce13
#95BB11
#78950E
#576C0E
#374309
Base = 600Lightest = 50 · #FAFCF2Darkest = 950 · #374309Text 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 0.048 123.1);
  --brand-100: oklch(0.94 0.077 123.1);
  --brand-200: oklch(0.88 0.115 123.1);
  --brand-300: oklch(0.80 0.149 123.1);
  --brand-400: oklch(0.72 0.176 123.1);
  --brand-500: oklch(0.64 0.191 123.1);
  --brand-600: oklch(0.56 0.191 123.1);
  --brand-700: oklch(0.48 0.180 123.1);
  --brand-800: oklch(0.40 0.161 123.1);
  --brand-900: oklch(0.32 0.134 123.1);
  --brand-950: oklch(0.24 0.105 123.1);
}

Colors that work with #a5ce13

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#F9FAF4
Tinted page background
Border#E3EDC0
Hairlines and dividers
Muted text#899B4B
Captions on the surface
Accent#0F14D2
Second voice, not a rival
Dark variant#5D750B
Hover, pressed, headers
Light variant#F8FDE8
Selected rows, tints
Dark surface#212414
Dark-mode background
Hover#8BAD10
One step down in lightness
Pressed#708D0D
Two steps down
Disabled#B3BC96
Chroma pulled out
Focus ring#BBED08
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 #a5ce13

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
  • Headers, footers and dark-mode surfaces
  • 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
  • Black 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 #5D750B
Safe as a 1px border on white
No — use #7F9F0F

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 low lightness adds weight and formality.

Worth knowing

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

Reads as
  • FormalityHigh
  • EnergyHigh
  • Weight56/100
  • TemperatureWarm
  • 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#3C13CE
Analogous left#CE9A13
Analogous right#47CE13
Split-complement 1#1347CE
Split-complement 2#9A13CE
Triadic 1#13A5CE
Triadic 2#CE13A5
Tetradic#13CE9A
On the wheel
Base+30°−30°+120°+240°+180°73°

#a5ce13 sits at 73°. Every dot is a harmony position and links to its own page in the table alongside.

RGB percentages

Red64.7%
Green80.8%
Blue7.5%
R · 0–255
165
0xa5
G · 0–255
206
0xce
B · 0–255
19
0x13

CMYK percentages

Cyan19.9%
Magenta0.0%
Yellow90.8%
Key (black)19.2%

Total ink coverage is 130%. Most commercial presses cap around 300% — above that, sheets stop drying properly.

Color previews

#a5ce13 text on a black background

contrast 11.44:1

Card sample

#a5ce13 text on a white background

contrast 1.84:1

Card sample

#a5ce13 on grey

1.68:1

#a5ce13 on its own surface

1.75:1

#a5ce13 on its dark surface

8.62:1

CSS3 live lab

Text font color

The quick brown fox

color: #a5ce13;
Background color
Panel with #a5ce13 background
background-color: #a5ce13;
Text shadow — hex

Glowing headline

text-shadow: 2px 2px 8px #a5ce13;
Text shadow — RGB

Soft neon halo

text-shadow: 0 0 14px rgba(165, 206, 19, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(165, 206, 19, 0.45);
Border & gradient
Gradient panel
border: 3px solid #a5ce13;
background: linear-gradient(135deg, #a5ce13, #28CE13);
Gradient text

Gradient headline

background: linear-gradient(90deg, #a5ce13, #13CE2D);
-webkit-background-clip: text;
color: transparent;
Focus ring
Focused control
outline: 2px solid #a5ce13;
outline-offset: 3px;
Underline & caret

Marked up text

text-decoration-color: #a5ce13;
caret-color: #a5ce13;
Left rule
Pull quote or callout
border-left: 4px solid #a5ce13;
Ring + tint
Selected chip
background: #F8FDE8;
box-shadow: inset 0 0 0 2px #a5ce13;
Conic badge
68%
background: conic-gradient(#a5ce13 68%, #e2e8f0 0);

Transparency

What each alpha value actually composites to. The top row is #a5ce13 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(165, 206, 19, 0.5)
rgb(165 206 19 / 50%)
#a5ce1380
hsl(73 83% 44% / 50%)
color-mix(in srgb, #a5ce13 50%, transparent)
Alpha8-digit hexFlat on white
10%#a5ce131a#F6FAE7
20%#a5ce1333#EDF5D0
40%#a5ce1366#DBEBA1
60%#a5ce1399#C9E271
80%#a5ce13cc#B7D842

Gradients from #a5ce13

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, #C3EC32, #a5ce13 45%, #5D750B);
Duotone
A short hue run reads richer than a flat fill
background: linear-gradient(120deg, #a5ce13, #15B210);
Complement sweep
Loud — keep it behind large type only
background: linear-gradient(90deg, #a5ce13, #3C13CE);
Spotlight
Hero panels and app headers
background: radial-gradient(120% 120% at 20% 0%, #CBEF4E 0%, #a5ce13 45%, #5D750B 100%);
Soft wash
Section backgrounds that stay readable
background: linear-gradient(180deg, #F9FAF4, #ffffff);
Mesh
Ambient background, no image weight
background: radial-gradient(60% 60% at 15% 20%, #EBA529 0%, transparent 60%), radial-gradient(55% 55% at 85% 15%, #40E916 0%, transparent 60%), radial-gradient(70% 70% at 50% 95%, #5D750B 0%, transparent 65%), #a5ce13;

Monochromatic scale

Palettes built from #a5ce13

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.

#a5ce13 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 11.44:1.

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.

#a5ce13, answered

What color is #a5ce13?

#a5ce13 is a dark electric green, closest to Yellow Green (ΔE2000 3.2). It sits at 73° on the hue wheel with 83% saturation and 44% lightness, which reads as warm.

What is the RGB value of #a5ce13?

rgb(165, 206, 19) — 165 red, 206 green and 19 blue out of 255, or 64.7% / 80.8% / 7.5% by channel.

What is #a5ce13 in HSL and HSV?

hsl(73, 83%, 44%) and hsv(73, 91%, 81%). HSL is what CSS takes; HSV is what your design tool's picker shows, which is why the saturation numbers rarely match.

Is #a5ce13 a light or a dark color?

It is a light color. Relative luminance is 0.5219 and perceived brightness is 71%, so black text on it reaches 11.44:1.

Should I use black or white text on #a5ce13?

Black. It scores 11.44:1 against #a5ce13, versus 1.84:1 for white — AAA at any size.

Is #a5ce13 accessible on a white background?

#a5ce13 on white scores 1.84:1, which fails WCAG AA at every size. Darken it to #657F0C to reach 4.5:1, or #4B5E09 for 7:1.

What is the complementary color of #a5ce13?

#3C13CE sits directly opposite on the wheel. Softer options are the split-complements #1347CE and #9A13CE, which give the same contrast with far less vibration.

What colors go well with #a5ce13?

For interface work: #F9FAF4 as the surface, #E3EDC0 for borders, #899B4B for secondary text, #0F14D2 as an accent and #5D750B for hover and pressed states. For a palette, the analogous pair #CE9A13 and #47CE13 stays calm, while #3C13CE is the loudest partner.

What is #a5ce13 in CMYK for printing?

cmyk(20%, 0%, 91%, 19%). 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 #a5ce13 warm or cool?

Warm — it scores 36 on a scale where 0 is the warmest orange and 100 the coolest azure. Nudged warmer it becomes #CEB213; nudged cooler, #60D011.

Which Tailwind color is closest to #a5ce13?

The lime family — its 500 step is #84cc16, ΔE2000 5.3 away. That is a visible difference, so define #a5ce13 as a custom token rather than reaching for the built-in.

How do I use #a5ce13 in Tailwind CSS?

Inline it as an arbitrary value with bg-[#a5ce13] or text-[#a5ce13], 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 #a5ce13 with 50% opacity?

rgba(165, 206, 19, 0.5), or #a5ce1380 in eight-digit hex. Over white that composites to #D2E789; over black, #53670A.

Is #a5ce13 a web-safe color?

No. The nearest web-safe colour is #99CC00, ΔE2000 1.8 away. The palette only matters for legacy displays and some email clients now.

What does the color #a5ce13 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 #a5ce13?

The safest is same-hue elevation: linear-gradient(135deg, #C3EC32, #a5ce13 45%, #5D750B). For more colour, a short hue run to #15B210 keeps it rich without turning muddy.

Work with #a5ce13 in the Color Lab

Every tool opens with this colour already loaded.

Every value on this page is computed from #a5ce13 at request time — conversions, contrast ratios and ΔE distances are calculated, never looked up.