#66BB37#66BB37

#66BB37 is a light, vivid yellow-green. Relative luminance 0.386; OKLCH L 71.2% C 0.185 H 136.6°. Best body text is #000000 at 8.73:1 contrast (WCAG AA passes).

Color values

HEX	#66BB37
RGB	rgb(102, 187, 55)
HSL	hsl(99, 55%, 47%)
HSV	hsv(99, 71%, 73%)
CMYK	cmyk(45.5%, 0%, 70.6%, 26.7%)
CIE-LAB	lab(68.49, -48.42, 56.01)
CIE-LCH	lch(68.49, 74.04, 130.84°)
OKLab	oklab(71.22% -0.1344 0.127)
OKLCH	oklch(71.22% 0.185 136.6)
XYZ	xyz(23.9387, 38.6398, 9.8105)
Luminance	0.3864 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66BB37 #8C37BB

analogous

#A8BB37 #66BB37 #37BB4A

triadic

#66BB37 #3766BB #BB3766

tetradic

#66BB37 #37A8BB #8C37BB #BB4A37

square

#66BB37 #37A8BB #8C37BB #BB4A37

split-complementary

#66BB37 #4A37BB #BB37A8

monochromatic

#325C1B #4C8C29 #66BB37 #87D05F #ABDE8E

Accessibility & contrast

On white

2.41

#66BB37 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.73

#66BB37 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66BB37

8.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66BB37	#FFFFFF	#000000	##000000
##66BB37	1.00	2.41	8.73	8.73
#FFFFFF	2.41	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)

#C1AB22

Deuteranopia (green-blind)

#B6A443

Tritanopia (blue-blind)

#62B4A1

Achromatopsia (no color)

#A7A7A7

Design tokens & code

CSS

--color: #66bb37;
/* rgb */ color: rgb(102, 187, 55);
/* oklch */ color: oklch(71.2% 0.185 136.6);

Tailwind

colors: {
  custom: {
    50: '#99d075',
    500: '#66bb37',
    950: '#000000',
  },
}

SCSS

$custom: #66bb37;
$custom-light: #99d075;
$custom-dark: #000000;

JSON

{
  "hex": "#66bb37",
  "rgb": {
    "r": 102,
    "g": 187,
    "b": 55
  },
  "hsl": {
    "h": 98.636,
    "s": 54.545,
    "l": 47.451
  },
  "oklch": {
    "l": 0.71216,
    "c": 0.18489,
    "h": 136.6
  },
  "luminance": 0.38641
}

Semantic roles & 50–950 ramp

primary

#66BB37

secondary

#B185C9

accent

#4ADEA9

background

#F9FCF7

surface

#F2F9ED

border

#CCD2C8

text

#0E1409

muted

#7E827B

Preview Lab

Preview with #66BB37

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

Preview Lab → · Contrast checker → · Palette generator →