#66BC23#66BC23

#66BC23 is a light, vivid yellow-green. Relative luminance 0.389; OKLCH L 71.3% C 0.197 H 135.4°. Best body text is #000000 at 8.78:1 contrast (WCAG AA passes).

Color values

HEX	#66BC23
RGB	rgb(102, 188, 35)
HSL	hsl(94, 69%, 44%)
HSV	hsv(94, 81%, 74%)
CMYK	cmyk(45.7%, 0%, 81.4%, 26.3%)
CIE-LAB	lab(68.69, -50.03, 62.78)
CIE-LCH	lch(68.69, 80.28, 128.55°)
OKLab	oklab(71.34% -0.14 0.1383)
OKLCH	oklch(71.34% 0.197 135.4)
XYZ	xyz(23.7655, 38.9111, 7.8481)
Luminance	0.3891 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66BC23 #7923BC

analogous

#B2BC23 #66BC23 #23BC2C

triadic

#66BC23 #2366BC #BC2366

tetradic

#66BC23 #23B2BC #7923BC #BC2C23

square

#66BC23 #23B2BC #7923BC #BC2C23

split-complementary

#66BC23 #2C23BC #BC23B2

monochromatic

#2E5510 #4A8819 #66BC23 #84DC41 #A6E574

Accessibility & contrast

On white

2.39

#66BC23 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.78

#66BC23 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66BC23

8.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66BC23	#FFFFFF	#000000	##000000
##66BC23	1.00	2.39	8.78	8.78
#FFFFFF	2.39	1.00	21.00	21.00
#000000	8.78	21.00	1.00	1.00
##000000	8.78	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#C3AC00

Deuteranopia (green-blind)

#B8A536

Tritanopia (blue-blind)

#63B5A0

Achromatopsia (no color)

#A8A8A8

Design tokens & code

CSS

--color: #66bc23;
/* rgb */ color: rgb(102, 188, 35);
/* oklch */ color: oklch(71.3% 0.197 135.4);

Tailwind

colors: {
  custom: {
    50: '#99d16c',
    500: '#66bc23',
    950: '#000000',
  },
}

SCSS

$custom: #66bc23;
$custom-light: #99d16c;
$custom-dark: #000000;

JSON

{
  "hex": "#66bc23",
  "rgb": {
    "r": 102,
    "g": 188,
    "b": 35
  },
  "hsl": {
    "h": 93.725,
    "s": 68.61,
    "l": 43.725
  },
  "oklch": {
    "l": 0.71343,
    "c": 0.19678,
    "h": 135.4
  },
  "luminance": 0.38913
}

Semantic roles & 50–950 ramp

primary

#66BC23

secondary

#A36FCC

accent

#3CEB9F

background

#FAFCF6

surface

#F3F9EC

border

#CDD2C7

text

#0F1408

muted

#7F827A

Preview Lab

Preview with #66BC23

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

Preview Lab → · Contrast checker → · Palette generator →