#5B100F#5B100F

#5B100F is a dark, moderate red. Relative luminance 0.026; OKLCH L 31.0% C 0.107 H 26.7°. Best body text is #FFFFFF at 13.76:1 contrast (WCAG AA passes).

Color values

HEX	#5B100F
RGB	rgb(91, 16, 15)
HSL	hsl(1, 72%, 21%)
HSV	hsv(1, 84%, 36%)
CMYK	cmyk(0%, 82.4%, 83.5%, 64.3%)
CIE-LAB	lab(18.50, 33.34, 21.62)
CIE-LCH	lch(18.50, 39.74, 32.96°)
OKLab	oklab(31.03% 0.0959 0.0483)
OKLCH	oklch(31.03% 0.107 26.7)
XYZ	xyz(4.5864, 2.6299, 0.7180)
Luminance	0.0263 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5B100F #0F5A5B

analogous

#5B0F34 #5B100F #5B360F

triadic

#5B100F #0F5B10 #100F5B

tetradic

#5B100F #345B0F #0F5A5B #360F5B

square

#5B100F #345B0F #0F5A5B #360F5B

split-complementary

#5B100F #0F5B36 #0F345B

monochromatic

#1A0504 #260706 #5B100F #901918 #C42220

Accessibility & contrast

On white

13.76

#5B100F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.53

#5B100F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #5B100F

13.76:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5B100F	#FFFFFF	#000000	##FFFFFF
##5B100F	1.00	13.76	1.53	13.76
#FFFFFF	13.76	1.00	21.00	1.00
#000000	1.53	21.00	1.00	21.00
##FFFFFF	13.76	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#27230E

Deuteranopia (green-blind)

#3A330C

Tritanopia (blue-blind)

#650011

Achromatopsia (no color)

#2D2D2D

Design tokens & code

CSS

--color: #5b100f;
/* rgb */ color: rgb(91, 16, 15);
/* oklch */ color: oklch(31.0% 0.107 26.7);

Tailwind

colors: {
  custom: {
    50: '#90564e',
    500: '#5b100f',
    950: '#000000',
  },
}

SCSS

$custom: #5b100f;
$custom-light: #90564e;
$custom-dark: #000000;

JSON

{
  "hex": "#5b100f",
  "rgb": {
    "r": 91,
    "g": 16,
    "b": 15
  },
  "hsl": {
    "h": 0.789,
    "s": 71.698,
    "l": 20.784
  },
  "oklch": {
    "l": 0.31025,
    "c": 0.1074,
    "h": 26.7
  },
  "luminance": 0.02629
}

Semantic roles & 50–950 ramp

primary

#5B100F

secondary

#319395

accent

#ECEE39

background

#F9F5F4

surface

#F2E9E7

border

#CCC5C3

text

#0E0301

muted

#7E7877

Preview Lab

Preview with #5B100F

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

Preview Lab → · Contrast checker → · Palette generator →