#66BD28#66BD28

#66BD28 is a light, vivid yellow-green. Relative luminance 0.394; OKLCH L 71.6% C 0.196 H 135.7°. Best body text is #000000 at 8.87:1 contrast (WCAG AA passes).

Color values

HEX	#66BD28
RGB	rgb(102, 189, 40)
HSL	hsl(95, 65%, 45%)
HSV	hsv(95, 79%, 74%)
CMYK	cmyk(46%, 0%, 78.8%, 25.9%)
CIE-LAB	lab(69.02, -50.17, 61.65)
CIE-LCH	lch(69.02, 79.49, 129.14°)
OKLab	oklab(71.62% -0.1401 0.1367)
OKLCH	oklch(71.62% 0.196 135.7)
XYZ	xyz(24.0595, 39.3717, 8.3388)
Luminance	0.3937 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66BD28 #7F28BD

analogous

#B0BD28 #66BD28 #28BD35

triadic

#66BD28 #2866BD #BD2866

tetradic

#66BD28 #28B0BD #7F28BD #BD3528

square

#66BD28 #28B0BD #7F28BD #BD3528

split-complementary

#66BD28 #3528BD #BD28B0

monochromatic

#2F5813 #4B8A1D #66BD28 #85D94A #A7E37C

Accessibility & contrast

On white

2.37

#66BD28 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.87

#66BD28 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66BD28

8.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66BD28	#FFFFFF	#000000	##000000
##66BD28	1.00	2.37	8.87	8.87
#FFFFFF	2.37	1.00	21.00	21.00
#000000	8.87	21.00	1.00	1.00
##000000	8.87	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#C4AD00

Deuteranopia (green-blind)

#B8A639

Tritanopia (blue-blind)

#63B6A2

Achromatopsia (no color)

#A8A8A8

Design tokens & code

CSS

--color: #66bd28;
/* rgb */ color: rgb(102, 189, 40);
/* oklch */ color: oklch(71.6% 0.196 135.7);

Tailwind

colors: {
  custom: {
    50: '#99d16e',
    500: '#66bd28',
    950: '#000000',
  },
}

SCSS

$custom: #66bd28;
$custom-light: #99d16e;
$custom-dark: #000000;

JSON

{
  "hex": "#66bd28",
  "rgb": {
    "r": 102,
    "g": 189,
    "b": 40
  },
  "hsl": {
    "h": 95.034,
    "s": 65.066,
    "l": 44.902
  },
  "oklch": {
    "l": 0.71623,
    "c": 0.1957,
    "h": 135.7
  },
  "luminance": 0.39373
}

Semantic roles & 50–950 ramp

primary

#66BD28

secondary

#A875CB

accent

#40E8A2

background

#F9FCF7

surface

#F2F9ED

border

#CCD2C8

text

#0F1408

muted

#7E827B

Preview Lab

Preview with #66BD28

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

Preview Lab → · Contrast checker → · Palette generator →