#3F831B#3F831B

#3F831B is a mid, vivid yellow-green. Relative luminance 0.174; OKLCH L 54.5% C 0.151 H 137.3°. Best body text is #FFFFFF at 4.69:1 contrast (WCAG AA passes).

Color values

HEX	#3F831B
RGB	rgb(63, 131, 27)
HSL	hsl(99, 66%, 31%)
HSV	hsv(99, 79%, 51%)
CMYK	cmyk(51.9%, 0%, 79.4%, 48.6%)
CIE-LAB	lab(48.72, -40.10, 45.98)
CIE-LCH	lch(48.72, 61.01, 131.09°)
OKLab	oklab(54.46% -0.1112 0.1025)
OKLCH	oklch(54.46% 0.151 137.3)
XYZ	xyz(10.3637, 17.3677, 3.8429)
Luminance	0.1737 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F831B #5F1B83

analogous

#73831B #3F831B #1B832B

triadic

#3F831B #1B3F83 #831B3F

tetradic

#3F831B #1B7383 #5F1B83 #832B1B

square

#3F831B #1B7383 #5F1B83 #832B1B

split-complementary

#3F831B #2B1B83 #831B73

monochromatic

#0E1E06 #275011 #3F831B #57B625 #75D841

Accessibility & contrast

On white

4.69

#3F831B on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.47

#3F831B on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F831B

4.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F831B	#FFFFFF	#000000	##FFFFFF
##3F831B	1.00	4.69	4.47	4.69
#FFFFFF	4.69	1.00	21.00	1.00
#000000	4.47	21.00	1.00	21.00
##FFFFFF	4.69	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#877701

Deuteranopia (green-blind)

#7F7226

Tritanopia (blue-blind)

#3B7E6F

Achromatopsia (no color)

#747474

Design tokens & code

CSS

--color: #3f831b;
/* rgb */ color: rgb(63, 131, 27);
/* oklch */ color: oklch(54.5% 0.151 137.3);

Tailwind

colors: {
  custom: {
    50: '#7ba860',
    500: '#3f831b',
    950: '#000000',
  },
}

SCSS

$custom: #3f831b;
$custom-light: #7ba860;
$custom-dark: #000000;

JSON

{
  "hex": "#3f831b",
  "rgb": {
    "r": 63,
    "g": 131,
    "b": 27
  },
  "hsl": {
    "h": 99.231,
    "s": 65.823,
    "l": 30.98
  },
  "oklch": {
    "l": 0.54462,
    "c": 0.15127,
    "h": 137.3
  },
  "luminance": 0.17368
}

Semantic roles & 50–950 ramp

primary

#3F831B

secondary

#8F43B6

accent

#3FE9AE

background

#F7FAF5

surface

#EEF4EA

border

#C9CEC6

text

#0A0F05

muted

#7C7F79

Preview Lab

Preview with #3F831B

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

Preview Lab → · Contrast checker → · Palette generator →