#66BB3A#66BB3A

#66BB3A is a light, vivid yellow-green. Relative luminance 0.387; OKLCH L 71.2% C 0.183 H 136.9°. Best body text is #000000 at 8.73:1 contrast (WCAG AA passes).

Color values

HEX	#66BB3A
RGB	rgb(102, 187, 58)
HSL	hsl(100, 53%, 48%)
HSV	hsv(100, 69%, 73%)
CMYK	cmyk(45.5%, 0%, 69%, 26.7%)
CIE-LAB	lab(68.51, -48.19, 54.87)
CIE-LCH	lch(68.51, 73.03, 131.29°)
OKLab	oklab(71.24% -0.1335 0.125)
OKLCH	oklch(71.24% 0.183 136.9)
XYZ	xyz(24.0128, 38.6694, 10.2008)
Luminance	0.3867 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66BB3A #8F3ABB

analogous

#A6BB3A #66BB3A #3ABB4E

triadic

#66BB3A #3A66BB #BB3A66

tetradic

#66BB3A #3AA6BB #8F3ABB #BB4E3A

square

#66BB3A #3AA6BB #8F3ABB #BB4E3A

split-complementary

#66BB3A #4E3ABB #BB3AA6

monochromatic

#335E1D #4D8C2C #66BB3A #88CF63 #ACDD92

Accessibility & contrast

On white

2.40

#66BB3A on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.73

#66BB3A on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66BB3A

8.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66BB3A	#FFFFFF	#000000	##000000
##66BB3A	1.00	2.40	8.73	8.73
#FFFFFF	2.40	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)

#C1AC27

Deuteranopia (green-blind)

#B6A446

Tritanopia (blue-blind)

#62B4A1

Achromatopsia (no color)

#A7A7A7

Design tokens & code

CSS

--color: #66bb3a;
/* rgb */ color: rgb(102, 187, 58);
/* oklch */ color: oklch(71.2% 0.183 136.9);

Tailwind

colors: {
  custom: {
    50: '#98d077',
    500: '#66bb3a',
    950: '#000000',
  },
}

SCSS

$custom: #66bb3a;
$custom-light: #98d077;
$custom-dark: #000000;

JSON

{
  "hex": "#66bb3a",
  "rgb": {
    "r": 102,
    "g": 187,
    "b": 58
  },
  "hsl": {
    "h": 99.535,
    "s": 52.653,
    "l": 48.039
  },
  "oklch": {
    "l": 0.71241,
    "c": 0.18292,
    "h": 136.9
  },
  "luminance": 0.38671
}

Semantic roles & 50–950 ramp

primary

#66BB3A

secondary

#B388C8

accent

#4CDCAB

background

#F9FCF7

surface

#F2F9ED

border

#CCD2C8

text

#0E1409

muted

#7E827B

Preview Lab

Preview with #66BB3A

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

Preview Lab → · Contrast checker → · Palette generator →