#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
RGB	rgb(66, 140, 27)
HSL	hsl(99, 68%, 33%)
HSV	hsv(99, 81%, 55%)
CMYK	cmyk(52.9%, 0%, 80.7%, 45.1%)
CIE-LAB	lab(51.83, -42.78, 48.98)
CIE-LCH	lch(51.83, 65.03, 131.13°)
OKLab	oklab(57.06% -0.1186 0.1088)
OKLCH	oklch(57.06% 0.161 137.5)
XYZ	xyz(11.8223, 19.9927, 4.2727)
Luminance	0.1999 (WCAG relative)
Temperature	warm
Family	yellow-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
##428C1B	1.00	4.20	5.00	5.00
#FFFFFF	4.20	1.00	21.00	21.00
#000000	5.00	21.00	1.00	1.00
##000000	5.00	21.00	1.00	1.00

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 →