#66BF37#66BF37

#66BF37 is a light, vivid yellow-green. Relative luminance 0.404; OKLCH L 72.2% C 0.190 H 136.9°. Best body text is #000000 at 9.07:1 contrast (WCAG AA passes).

Color values

HEX	#66BF37
RGB	rgb(102, 191, 55)
HSL	hsl(99, 55%, 48%)
HSV	hsv(99, 71%, 75%)
CMYK	cmyk(46.6%, 0%, 71.2%, 25.1%)
CIE-LAB	lab(69.73, -50.01, 57.28)
CIE-LCH	lch(69.73, 76.03, 131.12°)
OKLab	oklab(72.23% -0.1387 0.1296)
OKLCH	oklch(72.23% 0.19 136.9)
XYZ	xyz(24.7991, 40.3606, 10.0973)
Luminance	0.4036 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66BF37 #9037BF

analogous

#AABF37 #66BF37 #37BF4C

triadic

#66BF37 #3766BF #BF3766

tetradic

#66BF37 #37AABF #9037BF #BF4C37

square

#66BF37 #37AABF #9037BF #BF4C37

split-complementary

#66BF37 #4C37BF #BF37AA

monochromatic

#33601C #4D8F29 #66BF37 #88D262 #ACDF91

Accessibility & contrast

On white

2.31

#66BF37 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.07

#66BF37 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66BF37

9.07:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66BF37	#FFFFFF	#000000	##000000
##66BF37	1.00	2.31	9.07	9.07
#FFFFFF	2.31	1.00	21.00	21.00
#000000	9.07	21.00	1.00	1.00
##000000	9.07	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#C5AF20

Deuteranopia (green-blind)

#BAA844

Tritanopia (blue-blind)

#61B8A4

Achromatopsia (no color)

#AAAAAA

Design tokens & code

CSS

--color: #66bf37;
/* rgb */ color: rgb(102, 191, 55);
/* oklch */ color: oklch(72.2% 0.190 136.9);

Tailwind

colors: {
  custom: {
    50: '#99d376',
    500: '#66bf37',
    950: '#000000',
  },
}

SCSS

$custom: #66bf37;
$custom-light: #99d376;
$custom-dark: #000000;

JSON

{
  "hex": "#66bf37",
  "rgb": {
    "r": 102,
    "g": 191,
    "b": 55
  },
  "hsl": {
    "h": 99.265,
    "s": 55.285,
    "l": 48.235
  },
  "oklch": {
    "l": 0.72231,
    "c": 0.18984,
    "h": 136.9
  },
  "luminance": 0.40362
}

Semantic roles & 50–950 ramp

primary

#66BF37

secondary

#B388CA

accent

#49DFAB

background

#F9FDF7

surface

#F2FAED

border

#CCD3C8

text

#0F1409

muted

#7E837B

Preview Lab

Preview with #66BF37

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

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