#428C11#428C11

#428C11 is a mid, vivid yellow-green. Relative luminance 0.200; OKLCH L 57.0% C 0.165 H 136.8°. Best body text is #000000 at 4.99:1 contrast (WCAG AA passes).

Color values

HEX	#428C11
RGB	rgb(66, 140, 17)
HSL	hsl(96, 78%, 31%)
HSV	hsv(96, 88%, 55%)
CMYK	cmyk(52.9%, 0%, 87.9%, 45.1%)
CIE-LAB	lab(51.79, -43.27, 51.72)
CIE-LCH	lch(51.79, 67.43, 129.92°)
OKLab	oklab(57.01% -0.1205 0.113)
OKLCH	oklch(57.01% 0.165 136.8)
XYZ	xyz(11.7257, 19.9540, 3.7638)
Luminance	0.1996 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428C11 #5B118C

analogous

#7F8C11 #428C11 #118C1E

triadic

#428C11 #11428C #8C1142

tetradic

#428C11 #117F8C #5B118C #8C1E11

square

#428C11 #117F8C #5B118C #8C1E11

split-complementary

#428C11 #1E118C #8C117F

monochromatic

#0F1F04 #28550A #428C11 #5CC318 #79E631

Accessibility & contrast

On white

4.21

#428C11 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.99

#428C11 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428C11

4.99:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428C11	#FFFFFF	#000000	##000000
##428C11	1.00	4.21	4.99	4.99
#FFFFFF	4.21	1.00	21.00	21.00
#000000	4.99	21.00	1.00	1.00
##000000	4.99	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#917F00

Deuteranopia (green-blind)

#887922

Tritanopia (blue-blind)

#3D8777

Achromatopsia (no color)

#7B7B7B

Design tokens & code

CSS

--color: #428c11;
/* rgb */ color: rgb(66, 140, 17);
/* oklch */ color: oklch(57.0% 0.165 136.8);

Tailwind

colors: {
  custom: {
    50: '#7fae5e',
    500: '#428c11',
    950: '#000000',
  },
}

SCSS

$custom: #428c11;
$custom-light: #7fae5e;
$custom-dark: #000000;

JSON

{
  "hex": "#428c11",
  "rgb": {
    "r": 66,
    "g": 140,
    "b": 17
  },
  "hsl": {
    "h": 96.098,
    "s": 78.344,
    "l": 30.784
  },
  "oklch": {
    "l": 0.57006,
    "c": 0.16521,
    "h": 136.8
  },
  "luminance": 0.19955
}

Semantic roles & 50–950 ramp

primary

#428C11

secondary

#8A38C1

accent

#33F5A8

background

#F8FAF5

surface

#EFF4EA

border

#CACEC6

text

#0B1005

muted

#7C7F79

Preview Lab

Preview with #428C11

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

Preview Lab → · Contrast checker → · Palette generator →