#428E1B#428E1B

#428E1B is a mid, vivid yellow-green. Relative luminance 0.206; OKLCH L 57.6% C 0.163 H 137.7°. Best body text is #000000 at 5.12:1 contrast (WCAG AA passes).

Color values

HEX	#428E1B
RGB	rgb(66, 142, 27)
HSL	hsl(100, 68%, 33%)
HSV	hsv(100, 81%, 56%)
CMYK	cmyk(53.5%, 0%, 81%, 44.3%)
CIE-LAB	lab(52.49, -43.57, 49.60)
CIE-LCH	lch(52.49, 66.02, 131.29°)
OKLab	oklab(57.6% -0.1207 0.1101)
OKLCH	oklch(57.6% 0.163 137.7)
XYZ	xyz(12.1172, 20.5825, 4.3710)
Luminance	0.2058 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428E1B #671B8E

analogous

#7B8E1B #428E1B #1B8E2D

triadic

#428E1B #1B428E #8E1B42

tetradic

#428E1B #1B7B8E #671B8E #8E2D1B

square

#428E1B #1B7B8E #671B8E #8E2D1B

split-complementary

#428E1B #2D1B8E #8E1B7B

monochromatic

#122707 #2A5B11 #428E1B #5AC125 #7ADC47

Accessibility & contrast

On white

4.10

#428E1B on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.12

#428E1B on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428E1B

5.12:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428E1B	#FFFFFF	#000000	##000000
##428E1B	1.00	4.10	5.12	5.12
#FFFFFF	4.10	1.00	21.00	21.00
#000000	5.12	21.00	1.00	1.00
##000000	5.12	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#938100

Deuteranopia (green-blind)

#897B28

Tritanopia (blue-blind)

#3C8979

Achromatopsia (no color)

#7D7D7D

Design tokens & code

CSS

--color: #428e1b;
/* rgb */ color: rgb(66, 142, 27);
/* oklch */ color: oklch(57.6% 0.163 137.7);

Tailwind

colors: {
  custom: {
    50: '#7fb062',
    500: '#428e1b',
    950: '#000000',
  },
}

SCSS

$custom: #428e1b;
$custom-light: #7fb062;
$custom-dark: #000000;

JSON

{
  "hex": "#428e1b",
  "rgb": {
    "r": 66,
    "g": 142,
    "b": 27
  },
  "hsl": {
    "h": 99.652,
    "s": 68.047,
    "l": 33.137
  },
  "oklch": {
    "l": 0.576,
    "c": 0.16338,
    "h": 137.7
  },
  "luminance": 0.20583
}

Semantic roles & 50–950 ramp

primary

#428E1B

secondary

#9547BE

accent

#3DEBB0

background

#F8FAF6

surface

#EFF5EB

border

#CACFC6

text

#0B1005

muted

#7C7F7A

Preview Lab

Preview with #428E1B

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

Preview Lab → · Contrast checker → · Palette generator →