#40100B#40100B

#40100B is a dark, moderate red. Relative luminance 0.015; OKLCH L 25.5% C 0.076 H 29.3°. Best body text is #FFFFFF at 16.19:1 contrast (WCAG AA passes).

Color values

HEX	#40100B
RGB	rgb(64, 16, 11)
HSL	hsl(6, 71%, 15%)
HSV	hsv(6, 83%, 25%)
CMYK	cmyk(0%, 75%, 82.8%, 74.9%)
CIE-LAB	lab(12.51, 22.97, 14.72)
CIE-LCH	lch(12.51, 27.29, 32.66°)
OKLab	oklab(25.46% 0.0661 0.0371)
OKLCH	oklch(25.46% 0.076 29.3)
XYZ	xyz(2.3603, 1.4851, 0.4789)
Luminance	0.0149 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#40100B #0B3B40

analogous

#400B21 #40100B #402B0B

triadic

#40100B #0B4010 #100B40

tetradic

#40100B #21400B #0B3B40 #2B0B40

square

#40100B #21400B #0B3B40 #2B0B40

split-complementary

#40100B #0B402B #0B2140

monochromatic

#1A0704 #1A0704 #40100B #741D14 #A82A1D

Accessibility & contrast

On white

16.19

#40100B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.30

#40100B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #40100B

16.19:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##40100B	#FFFFFF	#000000	##FFFFFF
##40100B	1.00	16.19	1.30	16.19
#FFFFFF	16.19	1.00	21.00	1.00
#000000	1.30	21.00	1.00	21.00
##FFFFFF	16.19	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1D1A0A

Deuteranopia (green-blind)

#292409

Tritanopia (blue-blind)

#47040F

Achromatopsia (no color)

#212121

Design tokens & code

CSS

--color: #40100b;
/* rgb */ color: rgb(64, 16, 11);
/* oklch */ color: oklch(25.5% 0.076 29.3);

Tailwind

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

SCSS

$custom: #40100b;
$custom-light: #79514b;
$custom-dark: #000000;

JSON

{
  "hex": "#40100b",
  "rgb": {
    "r": 64,
    "g": 16,
    "b": 11
  },
  "hsl": {
    "h": 5.66,
    "s": 70.667,
    "l": 14.706
  },
  "oklch": {
    "l": 0.25459,
    "c": 0.07579,
    "h": 29.3
  },
  "luminance": 0.01485
}

Semantic roles & 50–950 ramp

primary

#40100B

secondary

#2A757D

accent

#DDED3A

background

#F7F4F4

surface

#EEE7E7

border

#C9C3C3

text

#0A0201

muted

#7C7877

Preview Lab

Preview with #40100B

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

Preview Lab → · Contrast checker → · Palette generator →