#3F901B#3F901B

#3F901B is a mid, vivid green. Relative luminance 0.211; OKLCH L 58.0% C 0.167 H 138.4°. Best body text is #000000 at 5.22:1 contrast (WCAG AA passes).

Color values

HEX	#3F901B
RGB	rgb(63, 144, 27)
HSL	hsl(102, 68%, 34%)
HSV	hsv(102, 81%, 56%)
CMYK	cmyk(56.3%, 0%, 81.3%, 43.5%)
CIE-LAB	lab(53.04, -45.22, 50.08)
CIE-LCH	lch(53.04, 67.47, 132.08°)
OKLab	oklab(58.02% -0.125 0.1111)
OKLCH	oklch(58.02% 0.167 138.4)
XYZ	xyz(12.2205, 21.0814, 4.4618)
Luminance	0.2108 (WCAG relative)
Temperature	warm
Family	green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F901B #6C1B90

analogous

#79901B #3F901B #1B9031

triadic

#3F901B #1B3F90 #901B3F

tetradic

#3F901B #1B7990 #6C1B90 #90311B

square

#3F901B #1B7990 #6C1B90 #90311B

split-complementary

#3F901B #311B90 #901B79

monochromatic

#122908 #285C11 #3F901B #56C425 #76DD49

Accessibility & contrast

On white

4.03

#3F901B on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.22

#3F901B on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F901B

5.22:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F901B	#FFFFFF	#000000	##000000
##3F901B	1.00	4.03	5.22	5.22
#FFFFFF	4.03	1.00	21.00	21.00
#000000	5.22	21.00	1.00	1.00
##000000	5.22	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#958300

Deuteranopia (green-blind)

#8A7C29

Tritanopia (blue-blind)

#388B7B

Achromatopsia (no color)

#7F7F7F

Design tokens & code

CSS

--color: #3f901b;
/* rgb */ color: rgb(63, 144, 27);
/* oklch */ color: oklch(58.0% 0.167 138.4);

Tailwind

colors: {
  custom: {
    50: '#7eb162',
    500: '#3f901b',
    950: '#000000',
  },
}

SCSS

$custom: #3f901b;
$custom-light: #7eb162;
$custom-dark: #000000;

JSON

{
  "hex": "#3f901b",
  "rgb": {
    "r": 63,
    "g": 144,
    "b": 27
  },
  "hsl": {
    "h": 101.538,
    "s": 68.421,
    "l": 33.529
  },
  "oklch": {
    "l": 0.58021,
    "c": 0.16723,
    "h": 138.4
  },
  "luminance": 0.21082
}

Semantic roles & 50–950 ramp

primary

#3F901B

secondary

#9A48BF

accent

#3DEBB6

background

#F8FBF6

surface

#EFF6EB

border

#CAD0C6

text

#0B1106

muted

#7C807A

Preview Lab

Preview with #3F901B

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

Preview Lab → · Contrast checker → · Palette generator →