#66D02C#66D02C

#66D02C is a light, highly saturated yellow-green. Relative luminance 0.481; OKLCH L 76.5% C 0.216 H 137.3°. Best body text is #000000 at 10.62:1 contrast (WCAG AA passes).

Color values

HEX	#66D02C
RGB	rgb(102, 208, 44)
HSL	hsl(99, 65%, 49%)
HSV	hsv(99, 79%, 82%)
CMYK	cmyk(51%, 0%, 78.8%, 18.4%)
CIE-LAB	lab(74.90, -57.18, 65.98)
CIE-LCH	lch(74.90, 87.31, 130.91°)
OKLab	oklab(76.47% -0.1587 0.1463)
OKLCH	oklch(76.47% 0.216 137.3)
XYZ	xyz(28.4891, 48.1163, 10.1685)
Luminance	0.4812 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66D02C #962CD0

analogous

#B8D02C #66D02C #2CD044

triadic

#66D02C #2C66D0 #D02C66

tetradic

#66D02C #2CB8D0 #962CD0 #D0442C

square

#66D02C #2CB8D0 #962CD0 #D0442C

split-complementary

#66D02C #442CD0 #D02CB8

monochromatic

#346B17 #4D9D21 #66D02C #8ADD5D #AEE78F

Accessibility & contrast

On white

1.98

#66D02C on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

10.62

#66D02C on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66D02C

10.62:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66D02C	#FFFFFF	#000000	##000000
##66D02C	1.00	1.98	10.62	10.62
#FFFFFF	1.98	1.00	21.00	21.00
#000000	10.62	21.00	1.00	1.00
##000000	10.62	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#D7BE00

Deuteranopia (green-blind)

#C9B53F

Tritanopia (blue-blind)

#5FC8B2

Achromatopsia (no color)

#B8B8B8

Design tokens & code

CSS

--color: #66d02c;
/* rgb */ color: rgb(102, 208, 44);
/* oklch */ color: oklch(76.5% 0.216 137.3);

Tailwind

colors: {
  custom: {
    50: '#9cdf73',
    500: '#66d02c',
    950: '#000000',
  },
}

SCSS

$custom: #66d02c;
$custom-light: #9cdf73;
$custom-dark: #000000;

JSON

{
  "hex": "#66d02c",
  "rgb": {
    "r": 102,
    "g": 208,
    "b": 44
  },
  "hsl": {
    "h": 98.78,
    "s": 65.079,
    "l": 49.412
  },
  "oklch": {
    "l": 0.76465,
    "c": 0.21583,
    "h": 137.3
  },
  "luminance": 0.48118
}

Semantic roles & 50–950 ramp

primary

#66D02C

secondary

#B786D2

accent

#40E8AD

background

#FAFDF7

surface

#F4FBED

border

#CED4C8

text

#0F1509

muted

#7F837B

Preview Lab

Preview with #66D02C

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

Preview Lab → · Contrast checker → · Palette generator →