#66BC2B#66BC2B

#66BC2B is a light, vivid yellow-green. Relative luminance 0.390; OKLCH L 71.4% C 0.193 H 135.8°. Best body text is #000000 at 8.79:1 contrast (WCAG AA passes).

Color values

HEX	#66BC2B
RGB	rgb(102, 188, 43)
HSL	hsl(96, 63%, 45%)
HSV	hsv(96, 77%, 74%)
CMYK	cmyk(45.7%, 0%, 77.1%, 26.3%)
CIE-LAB	lab(68.73, -49.61, 60.45)
CIE-LCH	lch(68.73, 78.20, 129.38°)
OKLab	oklab(71.39% -0.1384 0.1346)
OKLCH	oklch(71.39% 0.193 135.8)
XYZ	xyz(23.8982, 38.9641, 8.5466)
Luminance	0.3897 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66BC2B #812BBC

analogous

#AFBC2B #66BC2B #2BBC38

triadic

#66BC2B #2B66BC #BC2B66

tetradic

#66BC2B #2BAFBC #812BBC #BC382B

square

#66BC2B #2BAFBC #812BBC #BC382B

split-complementary

#66BC2B #382BBC #BC2BAF

monochromatic

#305814 #4B8A20 #66BC2B #85D64E #A8E280

Accessibility & contrast

On white

2.39

#66BC2B on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.79

#66BC2B on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66BC2B

8.79:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66BC2B	#FFFFFF	#000000	##000000
##66BC2B	1.00	2.39	8.79	8.79
#FFFFFF	2.39	1.00	21.00	21.00
#000000	8.79	21.00	1.00	1.00
##000000	8.79	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#C3AC02

Deuteranopia (green-blind)

#B7A53B

Tritanopia (blue-blind)

#63B5A1

Achromatopsia (no color)

#A8A8A8

Design tokens & code

CSS

--color: #66bc2b;
/* rgb */ color: rgb(102, 188, 43);
/* oklch */ color: oklch(71.4% 0.193 135.8);

Tailwind

colors: {
  custom: {
    50: '#99d170',
    500: '#66bc2b',
    950: '#000000',
  },
}

SCSS

$custom: #66bc2b;
$custom-light: #99d170;
$custom-dark: #000000;

JSON

{
  "hex": "#66bc2b",
  "rgb": {
    "r": 102,
    "g": 188,
    "b": 43
  },
  "hsl": {
    "h": 95.586,
    "s": 62.771,
    "l": 45.294
  },
  "oklch": {
    "l": 0.71386,
    "c": 0.19303,
    "h": 135.8
  },
  "luminance": 0.38966
}

Semantic roles & 50–950 ramp

primary

#66BC2B

secondary

#A978CB

accent

#42E6A3

background

#F9FCF7

surface

#F2F9ED

border

#CCD2C8

text

#0F1408

muted

#7E827B

Preview Lab

Preview with #66BC2B

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

Preview Lab → · Contrast checker → · Palette generator →