#428B1D#428B1D

#428B1D is a mid, vivid yellow-green. Relative luminance 0.197; OKLCH L 56.8% C 0.159 H 137.6°. Best body text is #000000 at 4.94:1 contrast (WCAG AA passes).

Color values

HEX	#428B1D
RGB	rgb(66, 139, 29)
HSL	hsl(100, 65%, 33%)
HSV	hsv(100, 79%, 55%)
CMYK	cmyk(52.5%, 0%, 79.1%, 45.5%)
CIE-LAB	lab(51.51, -42.26, 48.02)
CIE-LCH	lch(51.51, 63.97, 131.35°)
OKLab	oklab(56.8% -0.1171 0.1071)
OKLCH	oklch(56.8% 0.159 137.6)
XYZ	xyz(11.7008, 19.7113, 4.3503)
Luminance	0.1971 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428B1D #661D8B

analogous

#798B1D #428B1D #1D8B2F

triadic

#428B1D #1D428B #8B1D42

tetradic

#428B1D #1D798B #661D8B #8B2F1D

square

#428B1D #1D798B #661D8B #8B2F1D

split-complementary

#428B1D #2F1D8B #8B1D79

monochromatic

#122608 #2A5812 #428B1D #5ABE28 #7AD949

Accessibility & contrast

On white

4.25

#428B1D on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.94

#428B1D on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428B1D

4.94:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428B1D	#FFFFFF	#000000	##000000
##428B1D	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)

#907F01

Deuteranopia (green-blind)

#867829

Tritanopia (blue-blind)

#3D8676

Achromatopsia (no color)

#7B7B7B

Design tokens & code

CSS

--color: #428b1d;
/* rgb */ color: rgb(66, 139, 29);
/* oklch */ color: oklch(56.8% 0.159 137.6);

Tailwind

colors: {
  custom: {
    50: '#7ead62',
    500: '#428b1d',
    950: '#000000',
  },
}

SCSS

$custom: #428b1d;
$custom-light: #7ead62;
$custom-dark: #000000;

JSON

{
  "hex": "#428b1d",
  "rgb": {
    "r": 66,
    "g": 139,
    "b": 29
  },
  "hsl": {
    "h": 99.818,
    "s": 65.476,
    "l": 32.941
  },
  "oklch": {
    "l": 0.56796,
    "c": 0.15867,
    "h": 137.6
  },
  "luminance": 0.19712
}

Semantic roles & 50–950 ramp

primary

#428B1D

secondary

#9549BB

accent

#3FE8B0

background

#F8FAF6

surface

#EFF4EB

border

#CACEC6

text

#0B1006

muted

#7C7F7A

Preview Lab

Preview with #428B1D

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

Preview Lab → · Contrast checker → · Palette generator →