#66D738#66D738

#66D738 is a light, highly saturated green. Relative luminance 0.517; OKLCH L 78.3% C 0.218 H 138.4°. Best body text is #000000 at 11.34:1 contrast (WCAG AA passes).

Color values

HEX	#66D738
RGB	rgb(102, 215, 56)
HSL	hsl(103, 67%, 53%)
HSV	hsv(103, 74%, 84%)
CMYK	cmyk(52.6%, 0%, 74%, 15.7%)
CIE-LAB	lab(77.11, -59.03, 64.33)
CIE-LCH	lch(77.11, 87.32, 132.54°)
OKLab	oklab(78.31% -0.163 0.1445)
OKLCH	oklch(78.31% 0.218 138.4)
XYZ	xyz(30.4926, 51.7088, 12.1146)
Luminance	0.5171 (WCAG relative)
Temperature	warm
Family	green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66D738 #A938D7

analogous

#B5D738 #66D738 #38D75A

triadic

#66D738 #3866D7 #D73866

tetradic

#66D738 #38B5D7 #A938D7 #D75A38

square

#66D738 #38B5D7 #A938D7 #D75A38

split-complementary

#66D738 #5A38D7 #D738B5

monochromatic

#357C19 #4BAF23 #66D738 #8DE16B #B4EB9E

Accessibility & contrast

On white

1.85

#66D738 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

11.34

#66D738 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66D738

11.34:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66D738	#FFFFFF	#000000	##000000
##66D738	1.00	1.85	11.34	11.34
#FFFFFF	1.85	1.00	21.00	21.00
#000000	11.34	21.00	1.00	1.00
##000000	11.34	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#DEC417

Deuteranopia (green-blind)

#CFBB49

Tritanopia (blue-blind)

#5CD0B9

Achromatopsia (no color)

#BEBEBE

Design tokens & code

CSS

--color: #66d738;
/* rgb */ color: rgb(102, 215, 56);
/* oklch */ color: oklch(78.3% 0.218 138.4);

Tailwind

colors: {
  custom: {
    50: '#9ce479',
    500: '#66d738',
    950: '#000000',
  },
}

SCSS

$custom: #66d738;
$custom-light: #9ce479;
$custom-dark: #000000;

JSON

{
  "hex": "#66d738",
  "rgb": {
    "r": 102,
    "g": 215,
    "b": 56
  },
  "hsl": {
    "h": 102.642,
    "s": 66.527,
    "l": 53.137
  },
  "oklch": {
    "l": 0.78305,
    "c": 0.21783,
    "h": 138.4
  },
  "luminance": 0.51711
}

Semantic roles & 50–950 ramp

primary

#66D738

secondary

#6B3083

accent

#3EE9B8

background

#FCFEFB

surface

#F6FCF2

border

#D0D5CC

text

#0F160A

muted

#80847D

Preview Lab

Preview with #66D738

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

Preview Lab → · Contrast checker → · Palette generator →