#66B31E#66B31E

#66B31E is a light, vivid yellow-green. Relative luminance 0.352; OKLCH L 69.0% C 0.188 H 134.2°. Best body text is #000000 at 8.03:1 contrast (WCAG AA passes).

Color values

HEX	#66B31E
RGB	rgb(102, 179, 30)
HSL	hsl(91, 71%, 41%)
HSV	hsv(91, 83%, 70%)
CMYK	cmyk(43%, 0%, 83.2%, 29.8%)
CIE-LAB	lab(65.87, -46.67, 61.56)
CIE-LCH	lch(65.87, 77.25, 127.17°)
OKLab	oklab(69.02% -0.1313 0.135)
OKLCH	oklch(69.02% 0.188 134.2)
XYZ	xyz(21.8335, 35.1575, 6.8637)
Luminance	0.3516 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66B31E #6B1EB3

analogous

#B0B31E #66B31E #1EB321

triadic

#66B31E #1E66B3 #B31E66

tetradic

#66B31E #1EB0B3 #6B1EB3 #B3211E

square

#66B31E #1EB0B3 #6B1EB3 #B3211E

split-complementary

#66B31E #211EB3 #B31EB0

monochromatic

#2A4A0C #487F15 #66B31E #84DD32 #A4E566

Accessibility & contrast

On white

2.61

#66B31E on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.03

#66B31E on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66B31E

8.03:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66B31E	#FFFFFF	#000000	##000000
##66B31E	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)

#B09E31

Tritanopia (blue-blind)

#65AC98

Achromatopsia (no color)

#A0A0A0

Design tokens & code

CSS

--color: #66b31e;
/* rgb */ color: rgb(102, 179, 30);
/* oklch */ color: oklch(69.0% 0.188 134.2);

Tailwind

colors: {
  custom: {
    50: '#99ca69',
    500: '#66b31e',
    950: '#000000',
  },
}

SCSS

$custom: #66b31e;
$custom-light: #99ca69;
$custom-dark: #000000;

JSON

{
  "hex": "#66b31e",
  "rgb": {
    "r": 102,
    "g": 179,
    "b": 30
  },
  "hsl": {
    "h": 91.007,
    "s": 71.292,
    "l": 40.98
  },
  "oklch": {
    "l": 0.69024,
    "c": 0.18829,
    "h": 134.2
  },
  "luminance": 0.35159
}

Semantic roles & 50–950 ramp

primary

#66B31E

secondary

#9862CB

accent

#3AEE97

background

#F9FCF6

surface

#F2F8EC

border

#CCD1C7

text

#0F1307

muted

#7E827A

Preview Lab

Preview with #66B31E

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

Preview Lab → · Contrast checker → · Palette generator →