#66BD37#66BD37

#66BD37 is a light, vivid yellow-green. Relative luminance 0.395; OKLCH L 71.7% C 0.187 H 136.8°. Best body text is #000000 at 8.90:1 contrast (WCAG AA passes).

Color values

HEX	#66BD37
RGB	rgb(102, 189, 55)
HSL	hsl(99, 55%, 48%)
HSV	hsv(99, 71%, 74%)
CMYK	cmyk(46%, 0%, 70.9%, 25.9%)
CIE-LAB	lab(69.11, -49.22, 56.64)
CIE-LCH	lch(69.11, 75.04, 130.99°)
OKLab	oklab(71.72% -0.1365 0.1283)
OKLCH	oklch(71.72% 0.187 136.8)
XYZ	xyz(24.3660, 39.4942, 9.9529)
Luminance	0.3950 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66BD37 #8E37BD

analogous

#A9BD37 #66BD37 #37BD4B

triadic

#66BD37 #3766BD #BD3766

tetradic

#66BD37 #37A9BD #8E37BD #BD4B37

square

#66BD37 #37A9BD #8E37BD #BD4B37

split-complementary

#66BD37 #4B37BD #BD37A9

monochromatic

#335E1B #4C8E29 #66BD37 #88D160 #ABDF90

Accessibility & contrast

On white

2.36

#66BD37 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.90

#66BD37 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66BD37

8.90:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66BD37	#FFFFFF	#000000	##000000
##66BD37	1.00	2.36	8.90	8.90
#FFFFFF	2.36	1.00	21.00	21.00
#000000	8.90	21.00	1.00	1.00
##000000	8.90	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#C3AD21

Deuteranopia (green-blind)

#B8A644

Tritanopia (blue-blind)

#62B6A3

Achromatopsia (no color)

#A9A9A9

Design tokens & code

CSS

--color: #66bd37;
/* rgb */ color: rgb(102, 189, 55);
/* oklch */ color: oklch(71.7% 0.187 136.8);

Tailwind

colors: {
  custom: {
    50: '#99d176',
    500: '#66bd37',
    950: '#000000',
  },
}

SCSS

$custom: #66bd37;
$custom-light: #99d176;
$custom-dark: #000000;

JSON

{
  "hex": "#66bd37",
  "rgb": {
    "r": 102,
    "g": 189,
    "b": 55
  },
  "hsl": {
    "h": 98.955,
    "s": 54.918,
    "l": 47.843
  },
  "oklch": {
    "l": 0.71724,
    "c": 0.18737,
    "h": 136.8
  },
  "luminance": 0.39496
}

Semantic roles & 50–950 ramp

primary

#66BD37

secondary

#B286C9

accent

#4ADEAA

background

#F9FCF7

surface

#F2F9ED

border

#CCD2C8

text

#0F1409

muted

#7E827B

Preview Lab

Preview with #66BD37

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

Preview Lab → · Contrast checker → · Palette generator →