#66C529#66C529

#66C529 is a light, highly saturated yellow-green. Relative luminance 0.429; OKLCH L 73.7% C 0.205 H 136.4°. Best body text is #000000 at 9.58:1 contrast (WCAG AA passes).

Color values

HEX	#66C529
RGB	rgb(102, 197, 41)
HSL	hsl(97, 66%, 47%)
HSV	hsv(97, 79%, 77%)
CMYK	cmyk(48.2%, 0%, 79.2%, 22.7%)
CIE-LAB	lab(71.50, -53.22, 63.68)
CIE-LCH	lch(71.50, 82.98, 129.89°)
OKLab	oklab(73.66% -0.1482 0.141)
OKLCH	oklch(73.66% 0.205 136.4)
XYZ	xyz(25.8453, 42.9156, 9.0191)
Luminance	0.4292 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66C529 #8829C5

analogous

#B4C529 #66C529 #29C53A

triadic

#66C529 #2966C5 #C52966

tetradic

#66C529 #29B4C5 #8829C5 #C53A29

square

#66C529 #29B4C5 #8829C5 #C53A29

split-complementary

#66C529 #3A29C5 #C529B4

monochromatic

#326014 #4C921E #66C529 #87DB51 #AAE583

Accessibility & contrast

On white

2.19

#66C529 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.58

#66C529 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66C529

9.58:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66C529	#FFFFFF	#000000	##000000
##66C529	1.00	2.19	9.58	9.58
#FFFFFF	2.19	1.00	21.00	21.00
#000000	9.58	21.00	1.00	1.00
##000000	9.58	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#CCB400

Deuteranopia (green-blind)

#C0AC3B

Tritanopia (blue-blind)

#61BEA8

Achromatopsia (no color)

#AFAFAF

Design tokens & code

CSS

--color: #66c529;
/* rgb */ color: rgb(102, 197, 41);
/* oklch */ color: oklch(73.7% 0.205 136.4);

Tailwind

colors: {
  custom: {
    50: '#9ad770',
    500: '#66c529',
    950: '#000000',
  },
}

SCSS

$custom: #66c529;
$custom-light: #9ad770;
$custom-dark: #000000;

JSON

{
  "hex": "#66c529",
  "rgb": {
    "r": 102,
    "g": 197,
    "b": 41
  },
  "hsl": {
    "h": 96.538,
    "s": 65.546,
    "l": 46.667
  },
  "oklch": {
    "l": 0.73662,
    "c": 0.20458,
    "h": 136.4
  },
  "luminance": 0.42917
}

Semantic roles & 50–950 ramp

primary

#66C529

secondary

#AE7CCE

accent

#3FE8A6

background

#FAFDF7

surface

#F3FAED

border

#CDD3C8

text

#0F1408

muted

#7F837B

Preview Lab

Preview with #66C529

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

Preview Lab → · Contrast checker → · Palette generator →