#40571B#40571B

#40571B is a dark, moderate yellow-green. Relative luminance 0.080; OKLCH L 42.4% C 0.090 H 127.7°. Best body text is #FFFFFF at 8.09:1 contrast (WCAG AA passes).

Color values

HEX	#40571B
RGB	rgb(64, 87, 27)
HSL	hsl(83, 53%, 22%)
HSV	hsv(83, 69%, 34%)
CMYK	cmyk(26.4%, 0%, 69%, 65.9%)
CIE-LAB	lab(33.95, -19.37, 31.03)
CIE-LCH	lch(33.95, 36.57, 121.97°)
OKLab	oklab(42.4% -0.055 0.0712)
OKLCH	oklch(42.4% 0.09 127.7)
XYZ	xyz(5.7204, 7.9854, 2.2767)
Luminance	0.0799 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#40571B #321B57

analogous

#57501B #40571B #22571B

triadic

#40571B #1B4057 #571B40

tetradic

#40571B #1B5750 #321B57 #571B22

square

#40571B #1B5750 #321B57 #571B22

split-complementary

#40571B #1B2257 #501B57

monochromatic

#111707 #1E280D #40571B #628629 #85B438

Accessibility & contrast

On white

8.09

#40571B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.60

#40571B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #40571B

8.09:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##40571B	#FFFFFF	#000000	##FFFFFF
##40571B	1.00	8.09	2.60	8.09
#FFFFFF	8.09	1.00	21.00	1.00
#000000	2.60	21.00	1.00	21.00
##FFFFFF	8.09	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5C5113

Deuteranopia (green-blind)

#584F20

Tritanopia (blue-blind)

#42534B

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #40571b;
/* rgb */ color: rgb(64, 87, 27);
/* oklch */ color: oklch(42.4% 0.090 127.7);

Tailwind

colors: {
  custom: {
    50: '#77865b',
    500: '#40571b',
    950: '#000000',
  },
}

SCSS

$custom: #40571b;
$custom-light: #77865b;
$custom-dark: #000000;

JSON

{
  "hex": "#40571b",
  "rgb": {
    "r": 64,
    "g": 87,
    "b": 27
  },
  "hsl": {
    "h": 83,
    "s": 52.632,
    "l": 22.353
  },
  "oklch": {
    "l": 0.42402,
    "c": 0.08995,
    "h": 127.7
  },
  "luminance": 0.07986
}

Semantic roles & 50–950 ramp

primary

#40571B

secondary

#5E418D

accent

#4CDC83

background

#F7F8F5

surface

#EDEFE9

border

#C8CAC5

text

#090B04

muted

#7B7C79

Preview Lab

Preview with #40571B

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

Preview Lab → · Contrast checker → · Palette generator →