#40370D#40370D

#40370D is a dark, muted yellow. Relative luminance 0.039; OKLCH L 33.7% C 0.060 H 96.8°. Best body text is #FFFFFF at 11.86:1 contrast (WCAG AA passes).

Color values

HEX	#40370D
RGB	rgb(64, 55, 13)
HSL	hsl(49, 66%, 15%)
HSV	hsv(49, 80%, 25%)
CMYK	cmyk(0%, 14.1%, 79.7%, 74.9%)
CIE-LAB	lab(23.17, -1.67, 26.55)
CIE-LCH	lch(23.17, 26.61, 93.59°)
OKLab	oklab(33.72% -0.0071 0.0593)
OKLCH	oklch(33.72% 0.06 96.8)
XYZ	xyz(3.5534, 3.8516, 0.9370)
Luminance	0.0385 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#40370D #0D1640

analogous

#401E0D #40370D #2F400D

triadic

#40370D #0D4037 #370D40

tetradic

#40370D #0D401E #0D1640 #400D2F

square

#40370D #0D401E #0D1640 #400D2F

split-complementary

#40370D #0D2F40 #1E0D40

monochromatic

#191605 #191605 #40370D #736317 #A68E22

Accessibility & contrast

On white

11.86

#40370D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.77

#40370D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #40370D

11.86:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##40370D	#FFFFFF	#000000	##FFFFFF
##40370D	1.00	11.86	1.77	11.86
#FFFFFF	11.86	1.00	21.00	1.00
#000000	1.77	21.00	1.00	21.00
##FFFFFF	11.86	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3D3607

Deuteranopia (green-blind)

#40390F

Tritanopia (blue-blind)

#46322F

Achromatopsia (no color)

#373737

Design tokens & code

CSS

--color: #40370d;
/* rgb */ color: rgb(64, 55, 13);
/* oklch */ color: oklch(33.7% 0.060 96.8);

Tailwind

colors: {
  custom: {
    50: '#776d4e',
    500: '#40370d',
    950: '#000000',
  },
}

SCSS

$custom: #40370d;
$custom-light: #776d4e;
$custom-dark: #000000;

JSON

{
  "hex": "#40370d",
  "rgb": {
    "r": 64,
    "g": 55,
    "b": 13
  },
  "hsl": {
    "h": 49.412,
    "s": 66.234,
    "l": 15.098
  },
  "oklch": {
    "l": 0.33716,
    "c": 0.05971,
    "h": 96.8
  },
  "luminance": 0.03851
}

Semantic roles & 50–950 ramp

primary

#40370D

secondary

#2D3B7C

accent

#5DE93F

background

#F7F6F4

surface

#EDEBE7

border

#C8C6C3

text

#090702

muted

#7B7A78

Preview Lab

Preview with #40370D

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

Preview Lab → · Contrast checker → · Palette generator →