#66B41B#66B41B

#66B41B is a light, vivid yellow-green. Relative luminance 0.355; OKLCH L 69.3% C 0.191 H 134.2°. Best body text is #000000 at 8.11:1 contrast (WCAG AA passes).

Color values

HEX	#66B41B
RGB	rgb(102, 180, 27)
HSL	hsl(91, 74%, 41%)
HSV	hsv(91, 85%, 71%)
CMYK	cmyk(43.3%, 0%, 85%, 29.4%)
CIE-LAB	lab(66.17, -47.20, 62.56)
CIE-LCH	lch(66.17, 78.37, 127.03°)
OKLab	oklab(69.27% -0.1328 0.1367)
OKLCH	oklch(69.27% 0.191 134.2)
XYZ	xyz(21.9982, 35.5452, 6.7385)
Luminance	0.3555 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66B41B #691BB4

analogous

#B2B41B #66B41B #1BB41C

triadic

#66B41B #1B66B4 #B41B66

tetradic

#66B41B #1BB2B4 #691BB4 #B41C1B

square

#66B41B #1BB2B4 #691BB4 #B41C1B

split-complementary

#66B41B #1C1BB4 #B41BB2

monochromatic

#2A4A0B #487F13 #66B41B #84DF2D #A3E762

Accessibility & contrast

On white

2.59

#66B41B on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.11

#66B41B on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66B41B

8.11:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66B41B	#FFFFFF	#000000	##000000
##66B41B	1.00	2.59	8.11	8.11
#FFFFFF	2.59	1.00	21.00	21.00
#000000	8.11	21.00	1.00	1.00
##000000	8.11	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#BBA500

Deuteranopia (green-blind)

#B19F2F

Tritanopia (blue-blind)

#65AD99

Achromatopsia (no color)

#A1A1A1

Design tokens & code

CSS

--color: #66b41b;
/* rgb */ color: rgb(102, 180, 27);
/* oklch */ color: oklch(69.3% 0.191 134.2);

Tailwind

colors: {
  custom: {
    50: '#99cb68',
    500: '#66b41b',
    950: '#000000',
  },
}

SCSS

$custom: #66b41b;
$custom-light: #99cb68;
$custom-dark: #000000;

JSON

{
  "hex": "#66b41b",
  "rgb": {
    "r": 102,
    "g": 180,
    "b": 27
  },
  "hsl": {
    "h": 90.588,
    "s": 73.913,
    "l": 40.588
  },
  "oklch": {
    "l": 0.69267,
    "c": 0.19059,
    "h": 134.2
  },
  "luminance": 0.35546
}

Semantic roles & 50–950 ramp

primary

#66B41B

secondary

#965FCC

accent

#37F196

background

#F9FCF6

surface

#F2F8EB

border

#CCD1C6

text

#0F1307

muted

#7E827A

Preview Lab

Preview with #66B41B

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

Preview Lab → · Contrast checker → · Palette generator →