#66B31D#66B31D

#66B31D is a light, vivid yellow-green. Relative luminance 0.352; OKLCH L 69.0% C 0.189 H 134.2°. Best body text is #000000 at 8.03:1 contrast (WCAG AA passes).

Color values

HEX	#66B31D
RGB	rgb(102, 179, 29)
HSL	hsl(91, 72%, 41%)
HSV	hsv(91, 84%, 70%)
CMYK	cmyk(43%, 0%, 83.8%, 29.8%)
CIE-LAB	lab(65.87, -46.72, 61.81)
CIE-LCH	lch(65.87, 77.48, 127.08°)
OKLab	oklab(69.02% -0.1314 0.1354)
OKLCH	oklch(69.02% 0.189 134.2)
XYZ	xyz(21.8210, 35.1525, 6.7975)
Luminance	0.3515 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66B31D #6A1DB3

analogous

#B1B31D #66B31D #1DB31F

triadic

#66B31D #1D66B3 #B31D66

tetradic

#66B31D #1DB1B3 #6A1DB3 #B31F1D

square

#66B31D #1DB1B3 #6A1DB3 #B31F1D

split-complementary

#66B31D #1F1DB3 #B31DB1

monochromatic

#2A4A0C #487E14 #66B31D #84DD30 #A3E664

Accessibility & contrast

On white

2.61

#66B31D on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.03

#66B31D on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66B31D

8.03:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66B31D	#FFFFFF	#000000	##000000
##66B31D	1.00	2.61	8.03	8.03
#FFFFFF	2.61	1.00	21.00	21.00
#000000	8.03	21.00	1.00	1.00
##000000	8.03	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#BAA400

Deuteranopia (green-blind)

#B09E30

Tritanopia (blue-blind)

#65AC98

Achromatopsia (no color)

#A0A0A0

Design tokens & code

CSS

--color: #66b31d;
/* rgb */ color: rgb(102, 179, 29);
/* oklch */ color: oklch(69.0% 0.189 134.2);

Tailwind

colors: {
  custom: {
    50: '#99ca69',
    500: '#66b31d',
    950: '#000000',
  },
}

SCSS

$custom: #66b31d;
$custom-light: #99ca69;
$custom-dark: #000000;

JSON

{
  "hex": "#66b31d",
  "rgb": {
    "r": 102,
    "g": 179,
    "b": 29
  },
  "hsl": {
    "h": 90.8,
    "s": 72.115,
    "l": 40.784
  },
  "oklch": {
    "l": 0.6902,
    "c": 0.18868,
    "h": 134.2
  },
  "luminance": 0.35154
}

Semantic roles & 50–950 ramp

primary

#66B31D

secondary

#9761CB

accent

#39EF96

background

#F9FCF6

surface

#F2F8EC

border

#CCD1C7

text

#0F1307

muted

#7E827A

Preview Lab

Preview with #66B31D

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →