#428E11#428E11

#428E11 is a mid, vivid yellow-green. Relative luminance 0.205; OKLCH L 57.6% C 0.168 H 137.0°. Best body text is #000000 at 5.11:1 contrast (WCAG AA passes).

Color values

HEX	#428E11
RGB	rgb(66, 142, 17)
HSL	hsl(96, 79%, 31%)
HSV	hsv(96, 88%, 56%)
CMYK	cmyk(53.5%, 0%, 88%, 44.3%)
CIE-LAB	lab(52.45, -44.05, 52.30)
CIE-LCH	lch(52.45, 68.38, 130.11°)
OKLab	oklab(57.55% -0.1226 0.1143)
OKLCH	oklch(57.55% 0.168 137)
XYZ	xyz(12.0206, 20.5438, 3.8621)
Luminance	0.2054 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428E11 #5D118E

analogous

#808E11 #428E11 #118E1E

triadic

#428E11 #11428E #8E1142

tetradic

#428E11 #11808E #5D118E #8E1E11

square

#428E11 #11808E #5D118E #8E1E11

split-complementary

#428E11 #1E118E #8E1180

monochromatic

#0F2104 #29570A #428E11 #5BC518 #79E733

Accessibility & contrast

On white

4.11

#428E11 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.11

#428E11 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428E11

5.11:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428E11	#FFFFFF	#000000	##000000
##428E11	1.00	4.11	5.11	5.11
#FFFFFF	4.11	1.00	21.00	21.00
#000000	5.11	21.00	1.00	1.00
##000000	5.11	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#938100

Deuteranopia (green-blind)

#897B23

Tritanopia (blue-blind)

#3D8978

Achromatopsia (no color)

#7D7D7D

Design tokens & code

CSS

--color: #428e11;
/* rgb */ color: rgb(66, 142, 17);
/* oklch */ color: oklch(57.6% 0.168 137.0);

Tailwind

colors: {
  custom: {
    50: '#7fb05e',
    500: '#428e11',
    950: '#000000',
  },
}

SCSS

$custom: #428e11;
$custom-light: #7fb05e;
$custom-dark: #000000;

JSON

{
  "hex": "#428e11",
  "rgb": {
    "r": 66,
    "g": 142,
    "b": 17
  },
  "hsl": {
    "h": 96.48,
    "s": 78.616,
    "l": 31.176
  },
  "oklch": {
    "l": 0.57551,
    "c": 0.16757,
    "h": 137
  },
  "luminance": 0.20545
}

Semantic roles & 50–950 ramp

primary

#428E11

secondary

#8C38C2

accent

#33F5A9

background

#F8FAF5

surface

#EFF5EA

border

#CACFC6

text

#0B1005

muted

#7C7F79

Preview Lab

Preview with #428E11

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

Preview Lab → · Contrast checker → · Palette generator →