#428B1B#428B1B

#428B1B is a mid, vivid yellow-green. Relative luminance 0.197; OKLCH L 56.8% C 0.160 H 137.4°. Best body text is #000000 at 4.94:1 contrast (WCAG AA passes).

Color values

HEX	#428B1B
RGB	rgb(66, 139, 27)
HSL	hsl(99, 67%, 33%)
HSV	hsv(99, 81%, 55%)
CMYK	cmyk(52.5%, 0%, 80.6%, 45.5%)
CIE-LAB	lab(51.50, -42.38, 48.67)
CIE-LCH	lch(51.50, 64.54, 131.05°)
OKLab	oklab(56.78% -0.1176 0.1081)
OKLCH	oklch(56.78% 0.16 137.4)
XYZ	xyz(11.6768, 19.7018, 4.2242)
Luminance	0.1970 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428B1B #641B8B

analogous

#7A8B1B #428B1B #1B8B2C

triadic

#428B1B #1B428B #8B1B42

tetradic

#428B1B #1B7A8B #641B8B #8B2C1B

square

#428B1B #1B7A8B #641B8B #8B2C1B

split-complementary

#428B1B #2C1B8B #8B1B7A

monochromatic

#112507 #2A5811 #428B1B #5ABE25 #7ADB45

Accessibility & contrast

On white

4.25

#428B1B on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.94

#428B1B on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428B1B

4.94:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428B1B	#FFFFFF	#000000	##000000
##428B1B	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)

#867828

Tritanopia (blue-blind)

#3D8676

Achromatopsia (no color)

#7B7B7B

Design tokens & code

CSS

--color: #428b1b;
/* rgb */ color: rgb(66, 139, 27);
/* oklch */ color: oklch(56.8% 0.160 137.4);

Tailwind

colors: {
  custom: {
    50: '#7ead61',
    500: '#428b1b',
    950: '#000000',
  },
}

SCSS

$custom: #428b1b;
$custom-light: #7ead61;
$custom-dark: #000000;

JSON

{
  "hex": "#428b1b",
  "rgb": {
    "r": 66,
    "g": 139,
    "b": 27
  },
  "hsl": {
    "h": 99.107,
    "s": 67.47,
    "l": 32.549
  },
  "oklch": {
    "l": 0.56783,
    "c": 0.15971,
    "h": 137.4
  },
  "luminance": 0.19703
}

Semantic roles & 50–950 ramp

primary

#428B1B

secondary

#9345BC

accent

#3DEAAE

background

#F8FAF6

surface

#EFF4EB

border

#CACEC6

text

#0B1005

muted

#7C7F7A

Preview Lab

Preview with #428B1B

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

Preview Lab → · Contrast checker → · Palette generator →