#3F781B#3F781B

#3F781B is a mid, vivid yellow-green. Relative luminance 0.146; OKLCH L 51.4% C 0.137 H 136.1°. Best body text is #FFFFFF at 5.37:1 contrast (WCAG AA passes).

Color values

HEX	#3F781B
RGB	rgb(63, 120, 27)
HSL	hsl(97, 63%, 29%)
HSV	hsv(97, 78%, 47%)
CMYK	cmyk(47.5%, 0%, 77.5%, 52.9%)
CIE-LAB	lab(45.04, -35.50, 42.40)
CIE-LCH	lch(45.04, 55.30, 129.94°)
OKLab	oklab(51.43% -0.0988 0.0951)
OKLCH	oklch(51.43% 0.137 136.1)
XYZ	xyz(8.9640, 14.5683, 3.3763)
Luminance	0.1457 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F781B #541B78

analogous

#6E781B #3F781B #1B7826

triadic

#3F781B #1B3F78 #781B3F

tetradic

#3F781B #1B6E78 #541B78 #78261B

square

#3F781B #1B6E78 #541B78 #78261B

split-complementary

#3F781B #261B78 #781B6E

monochromatic

#0D1906 #254610 #3F781B #59AA26 #76D33B

Accessibility & contrast

On white

5.37

#3F781B on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.91

#3F781B on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F781B

5.37:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F781B	#FFFFFF	#000000	##FFFFFF
##3F781B	1.00	5.37	3.91	5.37
#FFFFFF	5.37	1.00	21.00	1.00
#000000	3.91	21.00	1.00	21.00
##FFFFFF	5.37	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#7C6E08

Deuteranopia (green-blind)

#756925

Tritanopia (blue-blind)

#3D7366

Achromatopsia (no color)

#6B6B6B

Design tokens & code

CSS

--color: #3f781b;
/* rgb */ color: rgb(63, 120, 27);
/* oklch */ color: oklch(51.4% 0.137 136.1);

Tailwind

colors: {
  custom: {
    50: '#7a9f5f',
    500: '#3f781b',
    950: '#000000',
  },
}

SCSS

$custom: #3f781b;
$custom-light: #7a9f5f;
$custom-dark: #000000;

JSON

{
  "hex": "#3f781b",
  "rgb": {
    "r": 63,
    "g": 120,
    "b": 27
  },
  "hsl": {
    "h": 96.774,
    "s": 63.265,
    "l": 28.824
  },
  "oklch": {
    "l": 0.51434,
    "c": 0.13712,
    "h": 136.1
  },
  "luminance": 0.14569
}

Semantic roles & 50–950 ramp

primary

#3F781B

secondary

#8343AC

accent

#41E6A7

background

#F7F9F5

surface

#EEF2E9

border

#C9CCC5

text

#0A0E05

muted

#7C7E79

Preview Lab

Preview with #3F781B

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

Preview Lab → · Contrast checker → · Palette generator →