#66BB39#66BB39

#66BB39 is a light, vivid yellow-green. Relative luminance 0.387; OKLCH L 71.2% C 0.184 H 136.8°. Best body text is #000000 at 8.73:1 contrast (WCAG AA passes).

Color values

HEX	#66BB39
RGB	rgb(102, 187, 57)
HSL	hsl(99, 53%, 48%)
HSV	hsv(99, 70%, 73%)
CMYK	cmyk(45.5%, 0%, 69.5%, 26.7%)
CIE-LAB	lab(68.50, -48.27, 55.26)
CIE-LCH	lch(68.50, 73.37, 131.14°)
OKLab	oklab(71.23% -0.1338 0.1257)
OKLCH	oklch(71.23% 0.184 136.8)
XYZ	xyz(23.9876, 38.6593, 10.0681)
Luminance	0.3866 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66BB39 #8E39BB

analogous

#A7BB39 #66BB39 #39BB4D

triadic

#66BB39 #3966BB #BB3966

tetradic

#66BB39 #39A7BB #8E39BB #BB4D39

square

#66BB39 #39A7BB #8E39BB #BB4D39

split-complementary

#66BB39 #4D39BB #BB39A7

monochromatic

#335D1C #4C8C2B #66BB39 #88CF62 #ABDD91

Accessibility & contrast

On white

2.40

#66BB39 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.73

#66BB39 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66BB39

8.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66BB39	#FFFFFF	#000000	##000000
##66BB39	1.00	2.40	8.73	8.73
#FFFFFF	2.40	1.00	21.00	21.00
#000000	8.73	21.00	1.00	1.00
##000000	8.73	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#C1AC25

Deuteranopia (green-blind)

#B6A445

Tritanopia (blue-blind)

#62B4A1

Achromatopsia (no color)

#A7A7A7

Design tokens & code

CSS

--color: #66bb39;
/* rgb */ color: rgb(102, 187, 57);
/* oklch */ color: oklch(71.2% 0.184 136.8);

Tailwind

colors: {
  custom: {
    50: '#98d077',
    500: '#66bb39',
    950: '#000000',
  },
}

SCSS

$custom: #66bb39;
$custom-light: #98d077;
$custom-dark: #000000;

JSON

{
  "hex": "#66bb39",
  "rgb": {
    "r": 102,
    "g": 187,
    "b": 57
  },
  "hsl": {
    "h": 99.231,
    "s": 53.279,
    "l": 47.843
  },
  "oklch": {
    "l": 0.71233,
    "c": 0.18359,
    "h": 136.8
  },
  "luminance": 0.38661
}

Semantic roles & 50–950 ramp

primary

#66BB39

secondary

#B287C8

accent

#4BDDAA

background

#F9FCF7

surface

#F2F9ED

border

#CCD2C8

text

#0E1409

muted

#7E827B

Preview Lab

Preview with #66BB39

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

Preview Lab → · Contrast checker → · Palette generator →