#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
RGBrgb(102, 180, 31)
HSLhsl(91, 71%, 41%)
HSVhsv(91, 83%, 71%)
CMYKcmyk(43.3%, 0%, 82.8%, 29.4%)
CIE-LABlab(66.19, -47.03, 61.58)
CIE-LCHlch(66.19, 77.49, 127.37°)
OKLaboklab(69.28% -0.1322 0.1352)
OKLCHoklch(69.28% 0.189 134.4)
XYZxyz(22.0476, 35.5650, 6.9991)
Luminance0.3557 (WCAG relative)
Temperaturewarm
Familyyellow-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
##66B41F1.002.598.118.11
#FFFFFF2.591.0021.0021.00
#0000008.1121.001.001.00
##0000008.1121.001.001.00

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 →

#66B41F Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva