#66D12B#66D12B

#66D12B is a light, highly saturated yellow-green. Relative luminance 0.486; OKLCH L 76.7% C 0.217 H 137.3°. Best body text is #000000 at 10.72:1 contrast (WCAG AA passes).

Color values

HEX	#66D12B
RGB	rgb(102, 209, 43)
HSL	hsl(99, 66%, 49%)
HSV	hsv(99, 79%, 82%)
CMYK	cmyk(51.2%, 0%, 79.4%, 18%)
CIE-LAB	lab(75.20, -57.60, 66.55)
CIE-LCH	lch(75.20, 88.02, 130.88°)
OKLab	oklab(76.71% -0.1599 0.1474)
OKLCH	oklch(76.71% 0.217 137.3)
XYZ	xyz(28.7151, 48.5980, 10.1522)
Luminance	0.4860 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66D12B #962BD1

analogous

#B9D12B #66D12B #2BD143

triadic

#66D12B #2B66D1 #D12B66

tetradic

#66D12B #2BB9D1 #962BD1 #D1432B

square

#66D12B #2BB9D1 #962BD1 #D1432B

split-complementary

#66D12B #432BD1 #D12BB9

monochromatic

#346B16 #4D9E21 #66D12B #8ADD5C #AEE88F

Accessibility & contrast

On white

1.96

#66D12B on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

10.72

#66D12B on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66D12B

10.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66D12B	#FFFFFF	#000000	##000000
##66D12B	1.00	1.96	10.72	10.72
#FFFFFF	1.96	1.00	21.00	21.00
#000000	10.72	21.00	1.00	1.00
##000000	10.72	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#D8BF00

Deuteranopia (green-blind)

#CAB63F

Tritanopia (blue-blind)

#5FC9B3

Achromatopsia (no color)

#B9B9B9

Design tokens & code

CSS

--color: #66d12b;
/* rgb */ color: rgb(102, 209, 43);
/* oklch */ color: oklch(76.7% 0.217 137.3);

Tailwind

colors: {
  custom: {
    50: '#9ce072',
    500: '#66d12b',
    950: '#000000',
  },
}

SCSS

$custom: #66d12b;
$custom-light: #9ce072;
$custom-dark: #000000;

JSON

{
  "hex": "#66d12b",
  "rgb": {
    "r": 102,
    "g": 209,
    "b": 43
  },
  "hsl": {
    "h": 98.675,
    "s": 65.873,
    "l": 49.412
  },
  "oklch": {
    "l": 0.76713,
    "c": 0.21743,
    "h": 137.3
  },
  "luminance": 0.486
}

Semantic roles & 50–950 ramp

primary

#66D12B

secondary

#B786D2

accent

#3FE9AC

background

#FAFDF7

surface

#F4FBED

border

#CED4C8

text

#0F1509

muted

#7F837B

Preview Lab

Preview with #66D12B

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

Preview Lab → · Contrast checker → · Palette generator →