#66C221#66C221

#66C221 is a light, highly saturated yellow-green. Relative luminance 0.415; OKLCH L 72.9% C 0.205 H 135.8°. Best body text is #000000 at 9.30:1 contrast (WCAG AA passes).

Color values

HEX	#66C221
RGB	rgb(102, 194, 33)
HSL	hsl(94, 71%, 45%)
HSV	hsv(94, 83%, 76%)
CMYK	cmyk(47.4%, 0%, 83%, 23.9%)
CIE-LAB	lab(70.54, -52.45, 64.97)
CIE-LCH	lch(70.54, 83.50, 128.91°)
OKLab	oklab(72.86% -0.1466 0.1426)
OKLCH	oklch(72.86% 0.205 135.8)
XYZ	xyz(25.0452, 41.5165, 8.1323)
Luminance	0.4152 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66C221 #7D21C2

analogous

#B6C221 #66C221 #21C22D

triadic

#66C221 #2166C2 #C22166

tetradic

#66C221 #21B6C2 #7D21C2 #C22D21

square

#66C221 #21B6C2 #7D21C2 #C22D21

split-complementary

#66C221 #2D21C2 #C221B6

monochromatic

#2F590F #4B8E18 #66C221 #85DF41 #A7E876

Accessibility & contrast

On white

2.26

#66C221 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.30

#66C221 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66C221

9.30:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66C221	#FFFFFF	#000000	##000000
##66C221	1.00	2.26	9.30	9.30
#FFFFFF	2.26	1.00	21.00	21.00
#000000	9.30	21.00	1.00	1.00
##000000	9.30	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#C9B100

Deuteranopia (green-blind)

#BDAA36

Tritanopia (blue-blind)

#62BBA5

Achromatopsia (no color)

#ACACAC

Design tokens & code

CSS

--color: #66c221;
/* rgb */ color: rgb(102, 194, 33);
/* oklch */ color: oklch(72.9% 0.205 135.8);

Tailwind

colors: {
  custom: {
    50: '#9ad56c',
    500: '#66c221',
    950: '#000000',
  },
}

SCSS

$custom: #66c221;
$custom-light: #9ad56c;
$custom-dark: #000000;

JSON

{
  "hex": "#66c221",
  "rgb": {
    "r": 102,
    "g": 194,
    "b": 33
  },
  "hsl": {
    "h": 94.286,
    "s": 70.925,
    "l": 44.51
  },
  "oklch": {
    "l": 0.7286,
    "c": 0.20451,
    "h": 135.8
  },
  "luminance": 0.41518
}

Semantic roles & 50–950 ramp

primary

#66C221

secondary

#A670CF

accent

#3AEEA1

background

#FAFDF6

surface

#F3FAEC

border

#CDD3C7

text

#0F1408

muted

#7F837A

Preview Lab

Preview with #66C221

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

Preview Lab → · Contrast checker → · Palette generator →