#66BB38#66BB38

#66BB38 is a light, vivid yellow-green. Relative luminance 0.387; OKLCH L 71.2% C 0.184 H 136.7°. Best body text is #000000 at 8.73:1 contrast (WCAG AA passes).

Color values

HEX	#66BB38
RGB	rgb(102, 187, 56)
HSL	hsl(99, 54%, 48%)
HSV	hsv(99, 70%, 73%)
CMYK	cmyk(45.5%, 0%, 70.1%, 26.7%)
CIE-LAB	lab(68.50, -48.34, 55.64)
CIE-LCH	lch(68.50, 73.70, 130.99°)
OKLab	oklab(71.22% -0.1341 0.1263)
OKLCH	oklch(71.22% 0.184 136.7)
XYZ	xyz(23.9629, 38.6494, 9.9380)
Luminance	0.3865 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66BB38 #8D38BB

analogous

#A8BB38 #66BB38 #38BB4B

triadic

#66BB38 #3866BB #BB3866

tetradic

#66BB38 #38A8BB #8D38BB #BB4B38

square

#66BB38 #38A8BB #8D38BB #BB4B38

split-complementary

#66BB38 #4B38BB #BB38A8

monochromatic

#335D1C #4C8C2A #66BB38 #88D061 #ABDE90

Accessibility & contrast

On white

2.41

#66BB38 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.73

#66BB38 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66BB38

8.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66BB38	#FFFFFF	#000000	##000000
##66BB38	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)

#C1AB23

Deuteranopia (green-blind)

#B6A444

Tritanopia (blue-blind)

#62B4A1

Achromatopsia (no color)

#A7A7A7

Design tokens & code

CSS

--color: #66bb38;
/* rgb */ color: rgb(102, 187, 56);
/* oklch */ color: oklch(71.2% 0.184 136.7);

Tailwind

colors: {
  custom: {
    50: '#99d076',
    500: '#66bb38',
    950: '#000000',
  },
}

SCSS

$custom: #66bb38;
$custom-light: #99d076;
$custom-dark: #000000;

JSON

{
  "hex": "#66bb38",
  "rgb": {
    "r": 102,
    "g": 187,
    "b": 56
  },
  "hsl": {
    "h": 98.931,
    "s": 53.909,
    "l": 47.647
  },
  "oklch": {
    "l": 0.71224,
    "c": 0.18425,
    "h": 136.7
  },
  "luminance": 0.38651
}

Semantic roles & 50–950 ramp

primary

#66BB38

secondary

#B186C8

accent

#4BDDAA

background

#F9FCF7

surface

#F2F9ED

border

#CCD2C8

text

#0E1409

muted

#7E827B

Preview Lab

Preview with #66BB38

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

Preview Lab → · Contrast checker → · Palette generator →