#428C18#428C18

#428C18 is a mid, vivid yellow-green. Relative luminance 0.200; OKLCH L 57.0% C 0.162 H 137.3°. Best body text is #000000 at 5.00:1 contrast (WCAG AA passes).

Color values

HEX	#428C18
RGB	rgb(66, 140, 24)
HSL	hsl(98, 71%, 32%)
HSV	hsv(98, 83%, 55%)
CMYK	cmyk(52.9%, 0%, 82.9%, 45.1%)
CIE-LAB	lab(51.81, -42.95, 49.89)
CIE-LCH	lch(51.81, 65.83, 130.72°)
OKLab	oklab(57.04% -0.1192 0.1102)
OKLCH	oklch(57.04% 0.162 137.3)
XYZ	xyz(11.7893, 19.9795, 4.0992)
Luminance	0.1998 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428C18 #62188C

analogous

#7C8C18 #428C18 #188C28

triadic

#428C18 #18428C #8C1842

tetradic

#428C18 #187C8C #62188C #8C2818

square

#428C18 #187C8C #62188C #8C2818

split-complementary

#428C18 #28188C #8C187C

monochromatic

#112406 #29580F #428C18 #5BC021 #79DE40

Accessibility & contrast

On white

4.20

#428C18 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.00

#428C18 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428C18

5.00:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428C18	#FFFFFF	#000000	##000000
##428C18	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)

#877926

Tritanopia (blue-blind)

#3D8777

Achromatopsia (no color)

#7B7B7B

Design tokens & code

CSS

--color: #428c18;
/* rgb */ color: rgb(66, 140, 24);
/* oklch */ color: oklch(57.0% 0.162 137.3);

Tailwind

colors: {
  custom: {
    50: '#7fae60',
    500: '#428c18',
    950: '#000000',
  },
}

SCSS

$custom: #428c18;
$custom-light: #7fae60;
$custom-dark: #000000;

JSON

{
  "hex": "#428c18",
  "rgb": {
    "r": 66,
    "g": 140,
    "b": 24
  },
  "hsl": {
    "h": 98.276,
    "s": 70.732,
    "l": 32.157
  },
  "oklch": {
    "l": 0.57038,
    "c": 0.16238,
    "h": 137.3
  },
  "luminance": 0.1998
}

Semantic roles & 50–950 ramp

primary

#428C18

secondary

#9141BF

accent

#3AEDAD

background

#F8FAF6

surface

#EFF4EB

border

#CACEC6

text

#0B1005

muted

#7C7F7A

Preview Lab

Preview with #428C18

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

Preview Lab → · Contrast checker → · Palette generator →