#66B41F#66B41F

#66B41F is a light, vivid yellow-green. Relative luminance 0.356; OKLCH L 69.3% C 0.189 H 134.4°. Best body text is #000000 at 8.11:1 contrast (WCAG AA passes).

Color values

HEX	#66B41F
RGB	rgb(102, 180, 31)
HSL	hsl(91, 71%, 41%)
HSV	hsv(91, 83%, 71%)
CMYK	cmyk(43.3%, 0%, 82.8%, 29.4%)
CIE-LAB	lab(66.19, -47.03, 61.58)
CIE-LCH	lch(66.19, 77.49, 127.37°)
OKLab	oklab(69.28% -0.1322 0.1352)
OKLCH	oklch(69.28% 0.189 134.4)
XYZ	xyz(22.0476, 35.5650, 6.9991)
Luminance	0.3557 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66B41F #6D1FB4

analogous

#B1B41F #66B41F #1FB422

triadic

#66B41F #1F66B4 #B41F66

tetradic

#66B41F #1FB1B4 #6D1FB4 #B4221F

square

#66B41F #1FB1B4 #6D1FB4 #B4221F

split-complementary

#66B41F #221FB4 #B41FB1

monochromatic

#2B4C0D #488016 #66B41F #84DC34 #A4E568

Accessibility & contrast

On white

2.59

#66B41F on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.11

#66B41F on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66B41F

8.11:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66B41F	#FFFFFF	#000000	##000000
##66B41F	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)

#B19F32

Tritanopia (blue-blind)

#65AD99

Achromatopsia (no color)

#A1A1A1

Design tokens & code

CSS

--color: #66b41f;
/* rgb */ color: rgb(102, 180, 31);
/* oklch */ color: oklch(69.3% 0.189 134.4);

Tailwind

colors: {
  custom: {
    50: '#99cb6a',
    500: '#66b41f',
    950: '#000000',
  },
}

SCSS

$custom: #66b41f;
$custom-light: #99cb6a;
$custom-dark: #000000;

JSON

{
  "hex": "#66b41f",
  "rgb": {
    "r": 102,
    "g": 180,
    "b": 31
  },
  "hsl": {
    "h": 91.409,
    "s": 70.616,
    "l": 41.373
  },
  "oklch": {
    "l": 0.69284,
    "c": 0.18906,
    "h": 134.4
  },
  "luminance": 0.35566
}

Semantic roles & 50–950 ramp

primary

#66B41F

secondary

#9A64CB

accent

#3AED98

background

#F9FCF6

surface

#F2F8EC

border

#CCD1C7

text

#0F1307

muted

#7E827A

Preview Lab

Preview with #66B41F

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

Preview Lab → · Contrast checker → · Palette generator →