#40591B#40591B

#40591B is a dark, moderate yellow-green. Relative luminance 0.083; OKLCH L 42.9% C 0.093 H 128.5°. Best body text is #FFFFFF at 7.89:1 contrast (WCAG AA passes).

Color values

HEX	#40591B
RGB	rgb(64, 89, 27)
HSL	hsl(84, 53%, 23%)
HSV	hsv(84, 70%, 35%)
CMYK	cmyk(28.1%, 0%, 69.7%, 65.1%)
CIE-LAB	lab(34.63, -20.42, 31.75)
CIE-LCH	lch(34.63, 37.75, 122.75°)
OKLab	oklab(42.95% -0.0579 0.0727)
OKLCH	oklch(42.95% 0.093 128.5)
XYZ	xyz(5.8845, 8.3137, 2.3314)
Luminance	0.0831 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#40591B #341B59

analogous

#59531B #40591B #21591B

triadic

#40591B #1B4059 #591B40

tetradic

#40591B #1B5953 #341B59 #591B21

square

#40591B #1B5953 #341B59 #591B21

split-complementary

#40591B #1B2159 #531B59

monochromatic

#111707 #1E2A0D #40591B #628829 #84B737

Accessibility & contrast

On white

7.89

#40591B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.66

#40591B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #40591B

7.89:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##40591B	#FFFFFF	#000000	##FFFFFF
##40591B	1.00	7.89	2.66	7.89
#FFFFFF	7.89	1.00	21.00	1.00
#000000	2.66	21.00	1.00	21.00
##FFFFFF	7.89	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5E5313

Deuteranopia (green-blind)

#5A5120

Tritanopia (blue-blind)

#42554C

Achromatopsia (no color)

#515151

Design tokens & code

CSS

--color: #40591b;
/* rgb */ color: rgb(64, 89, 27);
/* oklch */ color: oklch(42.9% 0.093 128.5);

Tailwind

colors: {
  custom: {
    50: '#77885b',
    500: '#40591b',
    950: '#000000',
  },
}

SCSS

$custom: #40591b;
$custom-light: #77885b;
$custom-dark: #000000;

JSON

{
  "hex": "#40591b",
  "rgb": {
    "r": 64,
    "g": 89,
    "b": 27
  },
  "hsl": {
    "h": 84.194,
    "s": 53.448,
    "l": 22.745
  },
  "oklch": {
    "l": 0.42949,
    "c": 0.09294,
    "h": 128.5
  },
  "luminance": 0.08314
}

Semantic roles & 50–950 ramp

primary

#40591B

secondary

#60418F

accent

#4BDD86

background

#F7F8F5

surface

#EDEFE9

border

#C8CAC5

text

#090B04

muted

#7B7C79

Preview Lab

Preview with #40591B

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

Preview Lab → · Contrast checker → · Palette generator →