#428F17#428F17

#428F17 is a mid, vivid yellow-green. Relative luminance 0.209; OKLCH L 57.9% C 0.166 H 137.4°. Best body text is #000000 at 5.17:1 contrast (WCAG AA passes).

Color values

HEX	#428F17
RGB	rgb(66, 143, 23)
HSL	hsl(99, 72%, 33%)
HSV	hsv(99, 84%, 56%)
CMYK	cmyk(53.8%, 0%, 83.9%, 43.9%)
CIE-LAB	lab(52.80, -44.17, 51.08)
CIE-LCH	lch(52.80, 67.53, 130.85°)
OKLab	oklab(57.85% -0.1226 0.1126)
OKLCH	oklch(57.85% 0.166 137.4)
XYZ	xyz(12.2235, 20.8641, 4.1935)
Luminance	0.2087 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428F17 #64178F

analogous

#7E8F17 #428F17 #178F28

triadic

#428F17 #17428F #8F1742

tetradic

#428F17 #177E8F #64178F #8F2817

square

#428F17 #177E8F #64178F #8F2817

split-complementary

#428F17 #28178F #8F177E

monochromatic

#112606 #2A5A0F #428F17 #5AC41F #7AE040

Accessibility & contrast

On white

4.06

#428F17 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.17

#428F17 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428F17

5.17:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428F17	#FFFFFF	#000000	##000000
##428F17	1.00	4.06	5.17	5.17
#FFFFFF	4.06	1.00	21.00	21.00
#000000	5.17	21.00	1.00	1.00
##000000	5.17	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#948200

Deuteranopia (green-blind)

#8A7C26

Tritanopia (blue-blind)

#3C8A79

Achromatopsia (no color)

#7E7E7E

Design tokens & code

CSS

--color: #428f17;
/* rgb */ color: rgb(66, 143, 23);
/* oklch */ color: oklch(57.9% 0.166 137.4);

Tailwind

colors: {
  custom: {
    50: '#7fb060',
    500: '#428f17',
    950: '#000000',
  },
}

SCSS

$custom: #428f17;
$custom-light: #7fb060;
$custom-dark: #000000;

JSON

{
  "hex": "#428f17",
  "rgb": {
    "r": 66,
    "g": 143,
    "b": 23
  },
  "hsl": {
    "h": 98.5,
    "s": 72.289,
    "l": 32.549
  },
  "oklch": {
    "l": 0.5785,
    "c": 0.16643,
    "h": 137.4
  },
  "luminance": 0.20865
}

Semantic roles & 50–950 ramp

primary

#428F17

secondary

#9341C1

accent

#39EFAE

background

#F8FAF6

surface

#EFF5EB

border

#CACFC6

text

#0B1105

muted

#7C807A

Preview Lab

Preview with #428F17

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

Preview Lab → · Contrast checker → · Palette generator →