#66BC38#66BC38

#66BC38 is a light, vivid yellow-green. Relative luminance 0.391; OKLCH L 71.5% C 0.185 H 136.8°. Best body text is #000000 at 8.82:1 contrast (WCAG AA passes).

Color values

HEX	#66BC38
RGB	rgb(102, 188, 56)
HSL	hsl(99, 54%, 48%)
HSV	hsv(99, 70%, 74%)
CMYK	cmyk(45.7%, 0%, 70.2%, 26.3%)
CIE-LAB	lab(68.81, -48.74, 55.95)
CIE-LCH	lch(68.81, 74.21, 131.06°)
OKLab	oklab(71.48% -0.1352 0.127)
OKLCH	oklch(71.48% 0.185 136.8)
XYZ	xyz(24.1758, 39.0752, 10.0090)
Luminance	0.3908 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66BC38 #8E38BC

analogous

#A8BC38 #66BC38 #38BC4C

triadic

#66BC38 #3866BC #BC3866

tetradic

#66BC38 #38A8BC #8E38BC #BC4C38

square

#66BC38 #38A8BC #8E38BC #BC4C38

split-complementary

#66BC38 #4C38BC #BC38A8

monochromatic

#335E1C #4C8D2A #66BC38 #88D061 #ABDE90

Accessibility & contrast

On white

2.38

#66BC38 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.82

#66BC38 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66BC38

8.82:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66BC38	#FFFFFF	#000000	##000000
##66BC38	1.00	2.38	8.82	8.82
#FFFFFF	2.38	1.00	21.00	21.00
#000000	8.82	21.00	1.00	1.00
##000000	8.82	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#C2AC23

Deuteranopia (green-blind)

#B7A544

Tritanopia (blue-blind)

#62B5A2

Achromatopsia (no color)

#A8A8A8

Design tokens & code

CSS

--color: #66bc38;
/* rgb */ color: rgb(102, 188, 56);
/* oklch */ color: oklch(71.5% 0.185 136.8);

Tailwind

colors: {
  custom: {
    50: '#99d176',
    500: '#66bc38',
    950: '#000000',
  },
}

SCSS

$custom: #66bc38;
$custom-light: #99d176;
$custom-dark: #000000;

JSON

{
  "hex": "#66bc38",
  "rgb": {
    "r": 102,
    "g": 188,
    "b": 56
  },
  "hsl": {
    "h": 99.091,
    "s": 54.098,
    "l": 47.843
  },
  "oklch": {
    "l": 0.71478,
    "c": 0.18549,
    "h": 136.8
  },
  "luminance": 0.39077
}

Semantic roles & 50–950 ramp

primary

#66BC38

secondary

#B287C9

accent

#4ADDAA

background

#F9FCF7

surface

#F2F9ED

border

#CCD2C8

text

#0E1409

muted

#7E827B

Preview Lab

Preview with #66BC38

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

Preview Lab → · Contrast checker → · Palette generator →