#428F21#428F21

#428F21 is a mid, vivid green. Relative luminance 0.209; OKLCH L 57.9% C 0.161 H 138.2°. Best body text is #000000 at 5.18:1 contrast (WCAG AA passes).

Color values

HEX	#428F21
RGB	rgb(66, 143, 33)
HSL	hsl(102, 63%, 35%)
HSV	hsv(102, 77%, 56%)
CMYK	cmyk(53.8%, 0%, 76.9%, 43.9%)
CIE-LAB	lab(52.85, -43.58, 47.94)
CIE-LCH	lch(52.85, 64.79, 132.27°)
OKLab	oklab(57.91% -0.1204 0.1075)
OKLCH	oklch(57.91% 0.161 138.2)
XYZ	xyz(12.3433, 20.9120, 4.8245)
Luminance	0.2091 (WCAG relative)
Temperature	warm
Family	green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428F21 #6E218F

analogous

#798F21 #428F21 #218F37

triadic

#428F21 #21428F #8F2142

tetradic

#428F21 #21798F #6E218F #8F3721

square

#428F21 #21798F #6E218F #8F3721

split-complementary

#428F21 #37218F #8F2179

monochromatic

#142C0A #2B5D16 #428F21 #59C12C #7BD753

Accessibility & contrast

On white

4.05

#428F21 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.18

#428F21 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428F21

5.18:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428F21	#FFFFFF	#000000	##000000
##428F21	1.00	4.05	5.18	5.18
#FFFFFF	4.05	1.00	21.00	21.00
#000000	5.18	21.00	1.00	1.00
##000000	5.18	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#948208

Deuteranopia (green-blind)

#8A7C2D

Tritanopia (blue-blind)

#3C8A7A

Achromatopsia (no color)

#7E7E7E

Design tokens & code

CSS

--color: #428f21;
/* rgb */ color: rgb(66, 143, 33);
/* oklch */ color: oklch(57.9% 0.161 138.2);

Tailwind

colors: {
  custom: {
    50: '#7fb065',
    500: '#428f21',
    950: '#000000',
  },
}

SCSS

$custom: #428f21;
$custom-light: #7fb065;
$custom-dark: #000000;

JSON

{
  "hex": "#428f21",
  "rgb": {
    "r": 66,
    "g": 143,
    "b": 33
  },
  "hsl": {
    "h": 102,
    "s": 62.5,
    "l": 34.51
  },
  "oklch": {
    "l": 0.5791,
    "c": 0.16141,
    "h": 138.2
  },
  "luminance": 0.20913
}

Semantic roles & 50–950 ramp

primary

#428F21

secondary

#9B51BB

accent

#42E6B5

background

#F8FAF6

surface

#EFF5EB

border

#CACFC6

text

#0B1106

muted

#7C807A

Preview Lab

Preview with #428F21

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

Preview Lab → · Contrast checker → · Palette generator →