#66C031#66C031

#66C031 is a light, vivid yellow-green. Relative luminance 0.407; OKLCH L 72.4% C 0.195 H 136.5°. Best body text is #000000 at 9.15:1 contrast (WCAG AA passes).

Color values

HEX	#66C031
RGB	rgb(102, 192, 49)
HSL	hsl(98, 59%, 47%)
HSV	hsv(98, 74%, 75%)
CMYK	cmyk(46.9%, 0%, 74.5%, 24.7%)
CIE-LAB	lab(70.00, -50.82, 59.69)
CIE-LCH	lch(70.00, 78.39, 130.41°)
OKLab	oklab(72.44% -0.1413 0.1339)
OKLCH	oklch(72.44% 0.195 136.5)
XYZ	xyz(24.8828, 40.7442, 9.4584)
Luminance	0.4075 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66C031 #8B31C0

analogous

#AEC031 #66C031 #31C043

triadic

#66C031 #3166C0 #C03166

tetradic

#66C031 #31AEC0 #8B31C0 #C04331

square

#66C031 #31AEC0 #8B31C0 #C04331

split-complementary

#66C031 #4331C0 #C031AE

monochromatic

#325E18 #4C8F25 #66C031 #87D559 #AAE18A

Accessibility & contrast

On white

2.30

#66C031 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.15

#66C031 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66C031

9.15:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66C031	#FFFFFF	#000000	##000000
##66C031	1.00	2.30	9.15	9.15
#FFFFFF	2.30	1.00	21.00	21.00
#000000	9.15	21.00	1.00	1.00
##000000	9.15	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#C7B013

Deuteranopia (green-blind)

#BBA840

Tritanopia (blue-blind)

#62B9A5

Achromatopsia (no color)

#ABABAB

Design tokens & code

CSS

--color: #66c031;
/* rgb */ color: rgb(102, 192, 49);
/* oklch */ color: oklch(72.4% 0.195 136.5);

Tailwind

colors: {
  custom: {
    50: '#99d473',
    500: '#66c031',
    950: '#000000',
  },
}

SCSS

$custom: #66c031;
$custom-light: #99d473;
$custom-dark: #000000;

JSON

{
  "hex": "#66c031",
  "rgb": {
    "r": 102,
    "g": 192,
    "b": 49
  },
  "hsl": {
    "h": 97.762,
    "s": 59.336,
    "l": 47.255
  },
  "oklch": {
    "l": 0.72441,
    "c": 0.19461,
    "h": 136.5
  },
  "luminance": 0.40746
}

Semantic roles & 50–950 ramp

primary

#66C031

secondary

#B082CB

accent

#45E3A8

background

#F9FDF7

surface

#F2FAED

border

#CCD3C8

text

#0F1409

muted

#7E837B

Preview Lab

Preview with #66C031

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

Preview Lab → · Contrast checker → · Palette generator →