#428B18#428B18

#428B18 is a mid, vivid yellow-green. Relative luminance 0.197; OKLCH L 56.8% C 0.161 H 137.2°. Best body text is #000000 at 4.94:1 contrast (WCAG AA passes).

Color values

HEX	#428B18
RGB	rgb(66, 139, 24)
HSL	hsl(98, 71%, 32%)
HSV	hsv(98, 83%, 55%)
CMYK	cmyk(52.5%, 0%, 82.7%, 45.5%)
CIE-LAB	lab(51.48, -42.55, 49.58)
CIE-LCH	lch(51.48, 65.34, 130.63°)
OKLab	oklab(56.77% -0.1182 0.1096)
OKLCH	oklch(56.77% 0.161 137.2)
XYZ	xyz(11.6439, 19.6886, 4.0507)
Luminance	0.1969 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428B18 #61188B

analogous

#7C8B18 #428B18 #188B28

triadic

#428B18 #18428B #8B1842

tetradic

#428B18 #187C8B #61188B #8B2818

square

#428B18 #187C8B #61188B #8B2818

split-complementary

#428B18 #28188B #8B187C

monochromatic

#102306 #29570F #428B18 #5BBF21 #79DE3F

Accessibility & contrast

On white

4.25

#428B18 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.94

#428B18 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428B18

4.94:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428B18	#FFFFFF	#000000	##000000
##428B18	1.00	4.25	4.94	4.94
#FFFFFF	4.25	1.00	21.00	21.00
#000000	4.94	21.00	1.00	1.00
##000000	4.94	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#907E00

Deuteranopia (green-blind)

#867826

Tritanopia (blue-blind)

#3D8676

Achromatopsia (no color)

#7B7B7B

Design tokens & code

CSS

--color: #428b18;
/* rgb */ color: rgb(66, 139, 24);
/* oklch */ color: oklch(56.8% 0.161 137.2);

Tailwind

colors: {
  custom: {
    50: '#7fad60',
    500: '#428b18',
    950: '#000000',
  },
}

SCSS

$custom: #428b18;
$custom-light: #7fad60;
$custom-dark: #000000;

JSON

{
  "hex": "#428b18",
  "rgb": {
    "r": 66,
    "g": 139,
    "b": 24
  },
  "hsl": {
    "h": 98.087,
    "s": 70.552,
    "l": 31.961
  },
  "oklch": {
    "l": 0.56766,
    "c": 0.16117,
    "h": 137.2
  },
  "luminance": 0.19689
}

Semantic roles & 50–950 ramp

primary

#428B18

secondary

#9040BE

accent

#3AEDAC

background

#F8FAF6

surface

#EFF4EB

border

#CACEC6

text

#0B1005

muted

#7C7F7A

Preview Lab

Preview with #428B18

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

Preview Lab → · Contrast checker → · Palette generator →