#40371C#40371C

#40371C is a dark, muted yellow. Relative luminance 0.039; OKLCH L 33.9% C 0.044 H 91.5°. Best body text is #FFFFFF at 11.79:1 contrast (WCAG AA passes).

Color values

HEX	#40371C
RGB	rgb(64, 55, 28)
HSL	hsl(45, 39%, 18%)
HSV	hsv(45, 56%, 25%)
CMYK	cmyk(0%, 14.1%, 56.2%, 74.9%)
CIE-LAB	lab(23.36, -0.35, 18.29)
CIE-LCH	lch(23.36, 18.29, 91.08°)
OKLab	oklab(33.92% -0.0011 0.0438)
OKLCH	oklch(33.92% 0.044 91.5)
XYZ	xyz(3.6903, 3.9064, 1.6580)
Luminance	0.0391 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#40371C #1C2540

analogous

#40251C #40371C #37401C

triadic

#40371C #1C4037 #371C40

tetradic

#40371C #1C4025 #1C2540 #401C37

square

#40371C #1C4025 #1C2540 #401C37

split-complementary

#40371C #1C3740 #251C40

monochromatic

#151209 #151209 #40371C #6B5C2F #958041

Accessibility & contrast

On white

11.79

#40371C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.78

#40371C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #40371C

11.79:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##40371C	#FFFFFF	#000000	##FFFFFF
##40371C	1.00	11.79	1.78	11.79
#FFFFFF	11.79	1.00	21.00	1.00
#000000	1.78	21.00	1.00	21.00
##FFFFFF	11.79	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3C361A

Deuteranopia (green-blind)

#3F391D

Tritanopia (blue-blind)

#453331

Achromatopsia (no color)

#383838

Design tokens & code

CSS

--color: #40371c;
/* rgb */ color: rgb(64, 55, 28);
/* oklch */ color: oklch(33.9% 0.044 91.5);

Tailwind

colors: {
  custom: {
    50: '#766d58',
    500: '#40371c',
    950: '#000000',
  },
}

SCSS

$custom: #40371c;
$custom-light: #766d58;
$custom-dark: #000000;

JSON

{
  "hex": "#40371c",
  "rgb": {
    "r": 64,
    "g": 55,
    "b": 28
  },
  "hsl": {
    "h": 45,
    "s": 39.13,
    "l": 18.039
  },
  "oklch": {
    "l": 0.33922,
    "c": 0.04382,
    "h": 91.5
  },
  "luminance": 0.03906
}

Semantic roles & 50–950 ramp

primary

#40371C

secondary

#434F75

accent

#76CF59

background

#F7F6F5

surface

#EDEBE9

border

#C8C6C5

text

#080703

muted

#7B7A78

Preview Lab

Preview with #40371C

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

Preview Lab → · Contrast checker → · Palette generator →