#66B239#66B239

#66B239 is a light, vivid yellow-green. Relative luminance 0.350; OKLCH L 68.9% C 0.172 H 136.0°. Best body text is #000000 at 7.99:1 contrast (WCAG AA passes).

Color values

HEX	#66B239
RGB	rgb(102, 178, 57)
HSL	hsl(98, 51%, 46%)
HSV	hsv(98, 68%, 70%)
CMYK	cmyk(42.7%, 0%, 68%, 30.2%)
CIE-LAB	lab(65.72, -44.59, 52.34)
CIE-LCH	lch(65.72, 68.76, 130.43°)
OKLab	oklab(68.95% -0.1239 0.1196)
OKLCH	oklch(68.95% 0.172 136)
XYZ	xyz(22.1378, 34.9597, 9.4515)
Luminance	0.3496 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66B239 #8539B2

analogous

#A2B239 #66B239 #39B248

triadic

#66B239 #3966B2 #B23966

tetradic

#66B239 #39A2B2 #8539B2 #B24839

square

#66B239 #39A2B2 #8539B2 #B24839

split-complementary

#66B239 #4839B2 #B239A2

monochromatic

#31551B #4B842A #66B239 #86CB5D #A9DA8B

Accessibility & contrast

On white

2.63

#66B239 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

7.99

#66B239 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66B239

7.99:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66B239	#FFFFFF	#000000	##000000
##66B239	1.00	2.63	7.99	7.99
#FFFFFF	2.63	1.00	21.00	21.00
#000000	7.99	21.00	1.00	1.00
##000000	7.99	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#B8A428

Deuteranopia (green-blind)

#AE9D44

Tritanopia (blue-blind)

#63AC9A

Achromatopsia (no color)

#A0A0A0

Design tokens & code

CSS

--color: #66b239;
/* rgb */ color: rgb(102, 178, 57);
/* oklch */ color: oklch(68.9% 0.172 136.0);

Tailwind

colors: {
  custom: {
    50: '#97c976',
    500: '#66b239',
    950: '#000000',
  },
}

SCSS

$custom: #66b239;
$custom-light: #97c976;
$custom-dark: #000000;

JSON

{
  "hex": "#66b239",
  "rgb": {
    "r": 102,
    "g": 178,
    "b": 57
  },
  "hsl": {
    "h": 97.686,
    "s": 51.489,
    "l": 46.078
  },
  "oklch": {
    "l": 0.68948,
    "c": 0.17216,
    "h": 136
  },
  "luminance": 0.34961
}

Semantic roles & 50–950 ramp

primary

#66B239

secondary

#AC82C4

accent

#4DDBA6

background

#F9FCF7

surface

#F2F8ED

border

#CCD1C8

text

#0E1309

muted

#7E827B

Preview Lab

Preview with #66B239

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

Preview Lab → · Contrast checker → · Palette generator →