#1F581B#1F581B

#1F581B is a dark, moderate green. Relative luminance 0.073; OKLCH L 40.8% C 0.110 H 142.2°. Best body text is #FFFFFF at 8.50:1 contrast (WCAG AA passes).

Color values

HEX	#1F581B
RGB	rgb(31, 88, 27)
HSL	hsl(116, 53%, 23%)
HSV	hsv(116, 69%, 35%)
CMYK	cmyk(64.8%, 0%, 69.3%, 65.5%)
CIE-LAB	lab(32.59, -31.94, 29.05)
CIE-LCH	lch(32.59, 43.17, 137.71°)
OKLab	oklab(40.82% -0.087 0.0674)
OKLCH	oklch(40.82% 0.11 142.2)
XYZ	xyz(4.2524, 7.3495, 2.2312)
Luminance	0.0735 (WCAG relative)
Temperature	neutral
Family	green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F581B #541B58

analogous

#3D581B #1F581B #1B5836

triadic

#1F581B #1B1F58 #581B1F

tetradic

#1F581B #1B3D58 #541B58 #58361B

square

#1F581B #1B3D58 #541B58 #58361B

split-complementary

#1F581B #361B58 #581B3D

monochromatic

#081707 #0F290D #1F581B #2F8729 #40B638

Accessibility & contrast

On white

8.50

#1F581B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.47

#1F581B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F581B

8.50:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F581B	#FFFFFF	#000000	##FFFFFF
##1F581B	1.00	8.50	2.47	8.50
#FFFFFF	8.50	1.00	21.00	1.00
#000000	2.47	21.00	1.00	21.00
##FFFFFF	8.50	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5A5014

Deuteranopia (green-blind)

#534B20

Tritanopia (blue-blind)

#15554B

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #1f581b;
/* rgb */ color: rgb(31, 88, 27);
/* oklch */ color: oklch(40.8% 0.110 142.2);

Tailwind

colors: {
  custom: {
    50: '#62885a',
    500: '#1f581b',
    950: '#000000',
  },
}

SCSS

$custom: #1f581b;
$custom-light: #62885a;
$custom-dark: #000000;

JSON

{
  "hex": "#1f581b",
  "rgb": {
    "r": 31,
    "g": 88,
    "b": 27
  },
  "hsl": {
    "h": 116.066,
    "s": 53.043,
    "l": 22.549
  },
  "oklch": {
    "l": 0.40824,
    "c": 0.11005,
    "h": 142.2
  },
  "luminance": 0.0735
}

Semantic roles & 50–950 ramp

primary

#1F581B

secondary

#89418E

accent

#4BDCD3

background

#F6F8F5

surface

#EBF0E9

border

#C6CBC5

text

#060B04

muted

#7A7C79

Preview Lab

Preview with #1F581B

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

Preview Lab → · Contrast checker → · Palette generator →