#3F811B#3F811B

#3F811B is a mid, vivid yellow-green. Relative luminance 0.168; OKLCH L 53.9% C 0.149 H 137.1°. Best body text is #FFFFFF at 4.81:1 contrast (WCAG AA passes).

Color values

HEX	#3F811B
RGB	rgb(63, 129, 27)
HSL	hsl(99, 65%, 31%)
HSV	hsv(99, 79%, 51%)
CMYK	cmyk(51.2%, 0%, 79.1%, 49.4%)
CIE-LAB	lab(48.05, -39.28, 45.34)
CIE-LCH	lch(48.05, 59.99, 130.90°)
OKLab	oklab(53.91% -0.109 0.1012)
OKLCH	oklch(53.91% 0.149 137.1)
XYZ	xyz(10.0977, 16.8357, 3.7542)
Luminance	0.1684 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F811B #5D1B81

analogous

#72811B #3F811B #1B812A

triadic

#3F811B #1B3F81 #811B3F

tetradic

#3F811B #1B7281 #5D1B81 #812A1B

square

#3F811B #1B7281 #5D1B81 #812A1B

split-complementary

#3F811B #2A1B81 #811B72

monochromatic

#0E1C06 #264E10 #3F811B #58B426 #75D73F

Accessibility & contrast

On white

4.81

#3F811B on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.37

#3F811B on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F811B

4.81:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F811B	#FFFFFF	#000000	##FFFFFF
##3F811B	1.00	4.81	4.37	4.81
#FFFFFF	4.81	1.00	21.00	1.00
#000000	4.37	21.00	1.00	21.00
##FFFFFF	4.81	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#857503

Deuteranopia (green-blind)

#7D7026

Tritanopia (blue-blind)

#3B7C6E

Achromatopsia (no color)

#727272

Design tokens & code

CSS

--color: #3f811b;
/* rgb */ color: rgb(63, 129, 27);
/* oklch */ color: oklch(53.9% 0.149 137.1);

Tailwind

colors: {
  custom: {
    50: '#7ba660',
    500: '#3f811b',
    950: '#000000',
  },
}

SCSS

$custom: #3f811b;
$custom-light: #7ba660;
$custom-dark: #000000;

JSON

{
  "hex": "#3f811b",
  "rgb": {
    "r": 63,
    "g": 129,
    "b": 27
  },
  "hsl": {
    "h": 98.824,
    "s": 65.385,
    "l": 30.588
  },
  "oklch": {
    "l": 0.53912,
    "c": 0.14874,
    "h": 137.1
  },
  "luminance": 0.16836
}

Semantic roles & 50–950 ramp

primary

#3F811B

secondary

#8D43B5

accent

#3FE8AD

background

#F7FAF5

surface

#EEF4EA

border

#C9CEC6

text

#0A0F05

muted

#7C7F79

Preview Lab

Preview with #3F811B

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

Preview Lab → · Contrast checker → · Palette generator →