#66BB31#66BB31

#66BB31 is a light, vivid yellow-green. Relative luminance 0.386; OKLCH L 71.2% C 0.189 H 136.1°. Best body text is #000000 at 8.72:1 contrast (WCAG AA passes).

Color values

HEX	#66BB31
RGB	rgb(102, 187, 49)
HSL	hsl(97, 58%, 46%)
HSV	hsv(97, 74%, 73%)
CMYK	cmyk(45.5%, 0%, 73.8%, 26.7%)
CIE-LAB	lab(68.45, -48.84, 58.17)
CIE-LCH	lch(68.45, 75.95, 130.02°)
OKLab	oklab(71.17% -0.1359 0.1307)
OKLCH	oklch(71.17% 0.189 136.1)
XYZ	xyz(23.8036, 38.5857, 9.0986)
Luminance	0.3859 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66BB31 #8631BB

analogous

#ABBB31 #66BB31 #31BB41

triadic

#66BB31 #3166BB #BB3166

tetradic

#66BB31 #31ABBB #8631BB #BB4131

square

#66BB31 #31ABBB #8631BB #BB4131

split-complementary

#66BB31 #4131BB #BB31AB

monochromatic

#315A18 #4C8B24 #66BB31 #86D356 #A9E087

Accessibility & contrast

On white

2.41

#66BB31 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.72

#66BB31 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66BB31

8.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66BB31	#FFFFFF	#000000	##000000
##66BB31	1.00	2.41	8.72	8.72
#FFFFFF	2.41	1.00	21.00	21.00
#000000	8.72	21.00	1.00	1.00
##000000	8.72	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#C2AB16

Deuteranopia (green-blind)

#B6A43F

Tritanopia (blue-blind)

#62B4A0

Achromatopsia (no color)

#A7A7A7

Design tokens & code

CSS

--color: #66bb31;
/* rgb */ color: rgb(102, 187, 49);
/* oklch */ color: oklch(71.2% 0.189 136.1);

Tailwind

colors: {
  custom: {
    50: '#99d072',
    500: '#66bb31',
    950: '#000000',
  },
}

SCSS

$custom: #66bb31;
$custom-light: #99d072;
$custom-dark: #000000;

JSON

{
  "hex": "#66bb31",
  "rgb": {
    "r": 102,
    "g": 187,
    "b": 49
  },
  "hsl": {
    "h": 96.957,
    "s": 58.475,
    "l": 46.275
  },
  "oklch": {
    "l": 0.71171,
    "c": 0.18856,
    "h": 136.1
  },
  "luminance": 0.38587
}

Semantic roles & 50–950 ramp

primary

#66BB31

secondary

#AD7FC9

accent

#46E2A6

background

#F9FCF7

surface

#F2F9ED

border

#CCD2C8

text

#0F1408

muted

#7E827B

Preview Lab

Preview with #66BB31

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

Preview Lab → · Contrast checker → · Palette generator →