#3F841B#3F841B

#3F841B is a mid, vivid yellow-green. Relative luminance 0.176; OKLCH L 54.7% C 0.153 H 137.4°. Best body text is #FFFFFF at 4.64:1 contrast (WCAG AA passes).

Color values

HEX	#3F841B
RGB	rgb(63, 132, 27)
HSL	hsl(99, 66%, 31%)
HSV	hsv(99, 80%, 52%)
CMYK	cmyk(52.3%, 0%, 79.5%, 48.2%)
CIE-LAB	lab(49.05, -40.50, 46.30)
CIE-LCH	lch(49.05, 61.52, 131.18°)
OKLab	oklab(54.74% -0.1123 0.1032)
OKLCH	oklch(54.74% 0.153 137.4)
XYZ	xyz(10.4987, 17.6377, 3.8879)
Luminance	0.1764 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F841B #601B84

analogous

#73841B #3F841B #1B842B

triadic

#3F841B #1B3F84 #841B3F

tetradic

#3F841B #1B7384 #601B84 #842B1B

square

#3F841B #1B7384 #601B84 #842B1B

split-complementary

#3F841B #2B1B84 #841B73

monochromatic

#0F1E06 #275111 #3F841B #57B725 #75D841

Accessibility & contrast

On white

4.64

#3F841B on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.53

#3F841B on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #3F841B

4.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F841B	#FFFFFF	#000000	##FFFFFF
##3F841B	1.00	4.64	4.53	4.64
#FFFFFF	4.64	1.00	21.00	1.00
#000000	4.53	21.00	1.00	21.00
##FFFFFF	4.64	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#897801

Deuteranopia (green-blind)

#807227

Tritanopia (blue-blind)

#3A7F70

Achromatopsia (no color)

#757575

Design tokens & code

CSS

--color: #3f841b;
/* rgb */ color: rgb(63, 132, 27);
/* oklch */ color: oklch(54.7% 0.153 137.4);

Tailwind

colors: {
  custom: {
    50: '#7ca860',
    500: '#3f841b',
    950: '#000000',
  },
}

SCSS

$custom: #3f841b;
$custom-light: #7ca860;
$custom-dark: #000000;

JSON

{
  "hex": "#3f841b",
  "rgb": {
    "r": 63,
    "g": 132,
    "b": 27
  },
  "hsl": {
    "h": 99.429,
    "s": 66.038,
    "l": 31.176
  },
  "oklch": {
    "l": 0.54737,
    "c": 0.15252,
    "h": 137.4
  },
  "luminance": 0.17638
}

Semantic roles & 50–950 ramp

primary

#3F841B

secondary

#9043B7

accent

#3FE9AF

background

#F7FAF5

surface

#EEF4EA

border

#C9CEC6

text

#0A1005

muted

#7C7F79

Preview Lab

Preview with #3F841B

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

Preview Lab → · Contrast checker → · Palette generator →