#428E18#428E18

#428E18 is a mid, vivid yellow-green. Relative luminance 0.206; OKLCH L 57.6% C 0.165 H 137.4°. Best body text is #000000 at 5.11:1 contrast (WCAG AA passes).

Color values

HEX	#428E18
RGB	rgb(66, 142, 24)
HSL	hsl(99, 71%, 33%)
HSV	hsv(99, 83%, 56%)
CMYK	cmyk(53.5%, 0%, 83.1%, 44.3%)
CIE-LAB	lab(52.47, -43.73, 50.50)
CIE-LCH	lch(52.47, 66.80, 130.89°)
OKLab	oklab(57.58% -0.1214 0.1115)
OKLCH	oklch(57.58% 0.165 137.4)
XYZ	xyz(12.0842, 20.5693, 4.1975)
Luminance	0.2057 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428E18 #64188E

analogous

#7D8E18 #428E18 #188E29

triadic

#428E18 #18428E #8E1842

tetradic

#428E18 #187D8E #64188E #8E2918

square

#428E18 #187D8E #64188E #8E2918

split-complementary

#428E18 #29188E #8E187D

monochromatic

#112506 #2A5A0F #428E18 #5AC221 #7ADF41

Accessibility & contrast

On white

4.11

#428E18 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.11

#428E18 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428E18

5.11:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428E18	#FFFFFF	#000000	##000000
##428E18	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)

#897B26

Tritanopia (blue-blind)

#3D8979

Achromatopsia (no color)

#7D7D7D

Design tokens & code

CSS

--color: #428e18;
/* rgb */ color: rgb(66, 142, 24);
/* oklch */ color: oklch(57.6% 0.165 137.4);

Tailwind

colors: {
  custom: {
    50: '#7fb061',
    500: '#428e18',
    950: '#000000',
  },
}

SCSS

$custom: #428e18;
$custom-light: #7fb061;
$custom-dark: #000000;

JSON

{
  "hex": "#428e18",
  "rgb": {
    "r": 66,
    "g": 142,
    "b": 24
  },
  "hsl": {
    "h": 98.644,
    "s": 71.084,
    "l": 32.549
  },
  "oklch": {
    "l": 0.57583,
    "c": 0.16479,
    "h": 137.4
  },
  "luminance": 0.2057
}

Semantic roles & 50–950 ramp

primary

#428E18

secondary

#9342C0

accent

#3AEEAE

background

#F8FAF6

surface

#EFF5EB

border

#CACFC6

text

#0B1005

muted

#7C7F7A

Preview Lab

Preview with #428E18

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

Preview Lab → · Contrast checker → · Palette generator →