#66CA28#66CA28

#66CA28 is a light, highly saturated yellow-green. Relative luminance 0.452; OKLCH L 74.9% C 0.211 H 136.7°. Best body text is #000000 at 10.04:1 contrast (WCAG AA passes).

Color values

HEX	#66CA28
RGB	rgb(102, 202, 40)
HSL	hsl(97, 67%, 47%)
HSV	hsv(97, 80%, 79%)
CMYK	cmyk(49.5%, 0%, 80.2%, 20.8%)
CIE-LAB	lab(73.03, -55.16, 65.39)
CIE-LCH	lch(73.03, 85.55, 130.15°)
OKLab	oklab(74.93% -0.1535 0.1445)
OKLCH	oklch(74.93% 0.211 136.7)
XYZ	xyz(26.9822, 45.2171, 9.3130)
Luminance	0.4522 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66CA28 #8C28CA

analogous

#B7CA28 #66CA28 #28CA3B

triadic

#66CA28 #2866CA #CA2866

tetradic

#66CA28 #28B7CA #8C28CA #CA3B28

square

#66CA28 #28B7CA #8C28CA #CA3B28

split-complementary

#66CA28 #3B28CA #CA28B7

monochromatic

#326414 #4C971E #66CA28 #87DD52 #ABE785

Accessibility & contrast

On white

2.09

#66CA28 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

10.04

#66CA28 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66CA28

10.04:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66CA28	#FFFFFF	#000000	##000000
##66CA28	1.00	2.09	10.04	10.04
#FFFFFF	2.09	1.00	21.00	21.00
#000000	10.04	21.00	1.00	1.00
##000000	10.04	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#D1B800

Deuteranopia (green-blind)

#C4B03B

Tritanopia (blue-blind)

#60C2AD

Achromatopsia (no color)

#B3B3B3

Design tokens & code

CSS

--color: #66ca28;
/* rgb */ color: rgb(102, 202, 40);
/* oklch */ color: oklch(74.9% 0.211 136.7);

Tailwind

colors: {
  custom: {
    50: '#9bdb70',
    500: '#66ca28',
    950: '#000000',
  },
}

SCSS

$custom: #66ca28;
$custom-light: #9bdb70;
$custom-dark: #000000;

JSON

{
  "hex": "#66ca28",
  "rgb": {
    "r": 102,
    "g": 202,
    "b": 40
  },
  "hsl": {
    "h": 97.037,
    "s": 66.942,
    "l": 47.451
  },
  "oklch": {
    "l": 0.74925,
    "c": 0.21078,
    "h": 136.7
  },
  "luminance": 0.45219
}

Semantic roles & 50–950 ramp

primary

#66CA28

secondary

#B17ED0

accent

#3EEAA8

background

#FAFDF7

surface

#F4FBED

border

#CED4C8

text

#0F1508

muted

#7F837B

Preview Lab

Preview with #66CA28

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

Preview Lab → · Contrast checker → · Palette generator →