#428C1B#428C1B

#428C1B is a mid, vivid yellow-green. Relative luminance 0.200; OKLCH L 57.1% C 0.161 H 137.5°. Best body text is #000000 at 5.00:1 contrast (WCAG AA passes).

Color values

HEX#428C1B
RGBrgb(66, 140, 27)
HSLhsl(99, 68%, 33%)
HSVhsv(99, 81%, 55%)
CMYKcmyk(52.9%, 0%, 80.7%, 45.1%)
CIE-LABlab(51.83, -42.78, 48.98)
CIE-LCHlch(51.83, 65.03, 131.13°)
OKLaboklab(57.06% -0.1186 0.1088)
OKLCHoklch(57.06% 0.161 137.5)
XYZxyz(11.8223, 19.9927, 4.2727)
Luminance0.1999 (WCAG relative)
Temperaturewarm
Familyyellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#428C1B #651B8C
analogous
#7A8C1B #428C1B #1B8C2C
triadic
#428C1B #1B428C #8C1B42
tetradic
#428C1B #1B7A8C #651B8C #8C2C1B
square
#428C1B #1B7A8C #651B8C #8C2C1B
split-complementary
#428C1B #2C1B8C #8C1B7A
monochromatic
#122507 #2A5911 #428C1B #5ABF25 #7ADB46

Accessibility & contrast

On white

4.20
#428C1B on #FFFFFF
AA ✗AA large ✓AAA ✗

On black

5.00
#428C1B on #000000
AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428C1B
5.00:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##428C1B#FFFFFF#000000##000000
##428C1B1.004.205.005.00
#FFFFFF4.201.0021.0021.00
#0000005.0021.001.001.00
##0000005.0021.001.001.00

Color blindness preview

Protanopia (red-blind)
#917F00
Deuteranopia (green-blind)
#877928
Tritanopia (blue-blind)
#3D8777
Achromatopsia (no color)
#7C7C7C

Design tokens & code

CSS
--color: #428c1b;
/* rgb */ color: rgb(66, 140, 27);
/* oklch */ color: oklch(57.1% 0.161 137.5);
Tailwind
colors: {
  custom: {
    50: '#7fae61',
    500: '#428c1b',
    950: '#000000',
  },
}
SCSS
$custom: #428c1b;
$custom-light: #7fae61;
$custom-dark: #000000;
JSON
{
  "hex": "#428c1b",
  "rgb": {
    "r": 66,
    "g": 140,
    "b": 27
  },
  "hsl": {
    "h": 99.292,
    "s": 67.665,
    "l": 32.745
  },
  "oklch": {
    "l": 0.57056,
    "c": 0.16094,
    "h": 137.5
  },
  "luminance": 0.19994
}

Semantic roles & 50–950 ramp

primary
#428C1B
secondary
#9446BD
accent
#3DEBAF
background
#F8FAF6
surface
#EFF4EB
border
#CACEC6
text
#0B1005
muted
#7C7F7A

Preview Lab

Preview with #428C1B

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

Preview Lab → · Contrast checker → · Palette generator →

#428C1B Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva