#40100D#40100D

#40100D is a dark, moderate red. Relative luminance 0.015; OKLCH L 25.5% C 0.075 H 27.3°. Best body text is #FFFFFF at 16.18:1 contrast (WCAG AA passes).

Color values

HEX	#40100D
RGB	rgb(64, 16, 13)
HSL	hsl(4, 66%, 15%)
HSV	hsv(4, 80%, 25%)
CMYK	cmyk(0%, 75%, 79.7%, 74.9%)
CIE-LAB	lab(12.54, 23.09, 13.86)
CIE-LCH	lch(12.54, 26.93, 30.97°)
OKLab	oklab(25.49% 0.067 0.0346)
OKLCH	oklch(25.49% 0.075 27.3)
XYZ	xyz(2.3725, 1.4900, 0.5434)
Luminance	0.0149 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#40100D #0D3D40

analogous

#400D24 #40100D #40290D

triadic

#40100D #0D4010 #100D40

tetradic

#40100D #24400D #0D3D40 #290D40

square

#40100D #24400D #0D3D40 #290D40

split-complementary

#40100D #0D4029 #0D2440

monochromatic

#190605 #190605 #40100D #731D17 #A62922

Accessibility & contrast

On white

16.18

#40100D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.30

#40100D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #40100D

16.18:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##40100D	#FFFFFF	#000000	##FFFFFF
##40100D	1.00	16.18	1.30	16.18
#FFFFFF	16.18	1.00	21.00	1.00
#000000	1.30	21.00	1.00	21.00
##FFFFFF	16.18	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1D1A0C

Deuteranopia (green-blind)

#29240C

Tritanopia (blue-blind)

#470510

Achromatopsia (no color)

#212121

Design tokens & code

CSS

--color: #40100d;
/* rgb */ color: rgb(64, 16, 13);
/* oklch */ color: oklch(25.5% 0.075 27.3);

Tailwind

colors: {
  custom: {
    50: '#79514c',
    500: '#40100d',
    950: '#000000',
  },
}

SCSS

$custom: #40100d;
$custom-light: #79514c;
$custom-dark: #000000;

JSON

{
  "hex": "#40100d",
  "rgb": {
    "r": 64,
    "g": 16,
    "b": 13
  },
  "hsl": {
    "h": 3.529,
    "s": 66.234,
    "l": 15.098
  },
  "oklch": {
    "l": 0.25493,
    "c": 0.07537,
    "h": 27.3
  },
  "luminance": 0.0149
}

Semantic roles & 50–950 ramp

primary

#40100D

secondary

#2D777C

accent

#DFE93F

background

#F7F4F4

surface

#EEE7E7

border

#C9C3C3

text

#0A0201

muted

#7C7877

Preview Lab

Preview with #40100D

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

Preview Lab → · Contrast checker → · Palette generator →