#66BC2D#66BC2D

#66BC2D is a light, vivid yellow-green. Relative luminance 0.390; OKLCH L 71.4% C 0.192 H 135.9°. Best body text is #000000 at 8.80:1 contrast (WCAG AA passes).

Color values

HEX	#66BC2D
RGB	rgb(102, 188, 45)
HSL	hsl(96, 61%, 46%)
HSV	hsv(96, 76%, 74%)
CMYK	cmyk(45.7%, 0%, 76.1%, 26.3%)
CIE-LAB	lab(68.74, -49.50, 59.81)
CIE-LCH	lch(68.74, 77.63, 129.61°)
OKLab	oklab(71.4% -0.138 0.1335)
OKLCH	oklch(71.4% 0.192 135.9)
XYZ	xyz(23.9357, 38.9792, 8.7446)
Luminance	0.3898 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66BC2D #832DBC

analogous

#ADBC2D #66BC2D #2DBC3C

triadic

#66BC2D #2D66BC #BC2D66

tetradic

#66BC2D #2DADBC #832DBC #BC3C2D

square

#66BC2D #2DADBC #832DBC #BC3C2D

split-complementary

#66BC2D #3C2DBC #BC2DAD

monochromatic

#305915 #4B8B21 #66BC2D #86D551 #A8E182

Accessibility & contrast

On white

2.39

#66BC2D on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.80

#66BC2D on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66BC2D

8.80:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66BC2D	#FFFFFF	#000000	##000000
##66BC2D	1.00	2.39	8.80	8.80
#FFFFFF	2.39	1.00	21.00	21.00
#000000	8.80	21.00	1.00	1.00
##000000	8.80	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#C3AC0A

Deuteranopia (green-blind)

#B7A53C

Tritanopia (blue-blind)

#63B5A1

Achromatopsia (no color)

#A8A8A8

Design tokens & code

CSS

--color: #66bc2d;
/* rgb */ color: rgb(102, 188, 45);
/* oklch */ color: oklch(71.4% 0.192 135.9);

Tailwind

colors: {
  custom: {
    50: '#99d171',
    500: '#66bc2d',
    950: '#000000',
  },
}

SCSS

$custom: #66bc2d;
$custom-light: #99d171;
$custom-dark: #000000;

JSON

{
  "hex": "#66bc2d",
  "rgb": {
    "r": 102,
    "g": 188,
    "b": 45
  },
  "hsl": {
    "h": 96.084,
    "s": 61.373,
    "l": 45.686
  },
  "oklch": {
    "l": 0.71399,
    "c": 0.19199,
    "h": 135.9
  },
  "luminance": 0.38981
}

Semantic roles & 50–950 ramp

primary

#66BC2D

secondary

#AA7BCA

accent

#43E4A4

background

#F9FCF7

surface

#F2F9ED

border

#CCD2C8

text

#0F1408

muted

#7E827B

Preview Lab

Preview with #66BC2D

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

Preview Lab → · Contrast checker → · Palette generator →