#428A18#428A18

#428A18 is a mid, vivid yellow-green. Relative luminance 0.194; OKLCH L 56.5% C 0.160 H 137.1°. Best body text is #000000 at 4.88:1 contrast (WCAG AA passes).

Color values

HEX	#428A18
RGB	rgb(66, 138, 24)
HSL	hsl(98, 70%, 32%)
HSV	hsv(98, 83%, 54%)
CMYK	cmyk(52.2%, 0%, 82.6%, 45.9%)
CIE-LAB	lab(51.15, -42.15, 49.28)
CIE-LCH	lch(51.15, 64.85, 130.54°)
OKLab	oklab(56.49% -0.1171 0.1089)
OKLCH	oklch(56.49% 0.16 137.1)
XYZ	xyz(11.4998, 19.4003, 4.0026)
Luminance	0.1940 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428A18 #60188A

analogous

#7B8A18 #428A18 #188A27

triadic

#428A18 #18428A #8A1842

tetradic

#428A18 #187B8A #60188A #8A2718

square

#428A18 #187B8A #60188A #8A2718

split-complementary

#428A18 #27188A #8A187B

monochromatic

#102206 #29560F #428A18 #5BBE21 #79DE3F

Accessibility & contrast

On white

4.30

#428A18 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.88

#428A18 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428A18

4.88:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428A18	#FFFFFF	#000000	##000000
##428A18	1.00	4.30	4.88	4.88
#FFFFFF	4.30	1.00	21.00	21.00
#000000	4.88	21.00	1.00	1.00
##000000	4.88	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#8F7E00

Deuteranopia (green-blind)

#867826

Tritanopia (blue-blind)

#3D8575

Achromatopsia (no color)

#7A7A7A

Design tokens & code

CSS

--color: #428a18;
/* rgb */ color: rgb(66, 138, 24);
/* oklch */ color: oklch(56.5% 0.160 137.1);

Tailwind

colors: {
  custom: {
    50: '#7ead60',
    500: '#428a18',
    950: '#000000',
  },
}

SCSS

$custom: #428a18;
$custom-light: #7ead60;
$custom-dark: #000000;

JSON

{
  "hex": "#428a18",
  "rgb": {
    "r": 66,
    "g": 138,
    "b": 24
  },
  "hsl": {
    "h": 97.895,
    "s": 70.37,
    "l": 31.765
  },
  "oklch": {
    "l": 0.56493,
    "c": 0.15995,
    "h": 137.1
  },
  "luminance": 0.19401
}

Semantic roles & 50–950 ramp

primary

#428A18

secondary

#8F40BD

accent

#3BEDAB

background

#F8FAF5

surface

#EFF4EA

border

#CACEC6

text

#0B1005

muted

#7C7F79

Preview Lab

Preview with #428A18

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

Preview Lab → · Contrast checker → · Palette generator →