#5B101B#5B101B

#5B101B is a dark, moderate red. Relative luminance 0.027; OKLCH L 31.2% C 0.106 H 18.3°. Best body text is #FFFFFF at 13.68:1 contrast (WCAG AA passes).

Color values

HEX	#5B101B
RGB	rgb(91, 16, 27)
HSL	hsl(351, 70%, 21%)
HSV	hsv(351, 82%, 36%)
CMYK	cmyk(0%, 82.4%, 70.3%, 64.3%)
CIE-LAB	lab(18.69, 33.97, 14.03)
CIE-LCH	lch(18.69, 36.75, 22.45°)
OKLab	oklab(31.23% 0.1009 0.0334)
OKLCH	oklch(31.23% 0.106 18.3)
XYZ	xyz(4.6980, 2.6746, 1.3056)
Luminance	0.0267 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5B101B #105B50

analogous

#5B1040 #5B101B #5B2A10

triadic

#5B101B #1B5B10 #101B5B

tetradic

#5B101B #405B10 #105B50 #2A105B

square

#5B101B #405B10 #105B50 #2A105B

split-complementary

#5B101B #105B2A #10405B

monochromatic

#1A0508 #27070C #5B101B #8F192A #C3223A

Accessibility & contrast

On white

13.68

#5B101B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.53

#5B101B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #5B101B

13.68:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5B101B	#FFFFFF	#000000	##FFFFFF
##5B101B	1.00	13.68	1.53	13.68
#FFFFFF	13.68	1.00	21.00	1.00
#000000	1.53	21.00	1.00	21.00
##FFFFFF	13.68	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#26231B

Deuteranopia (green-blind)

#393319

Tritanopia (blue-blind)

#650015

Achromatopsia (no color)

#2D2D2D

Design tokens & code

CSS

--color: #5b101b;
/* rgb */ color: rgb(91, 16, 27);
/* oklch */ color: oklch(31.2% 0.106 18.3);

Tailwind

colors: {
  custom: {
    50: '#8f5657',
    500: '#5b101b',
    950: '#000000',
  },
}

SCSS

$custom: #5b101b;
$custom-light: #8f5657;
$custom-dark: #000000;

JSON

{
  "hex": "#5b101b",
  "rgb": {
    "r": 91,
    "g": 16,
    "b": 27
  },
  "hsl": {
    "h": 351.2,
    "s": 70.093,
    "l": 20.98
  },
  "oklch": {
    "l": 0.31231,
    "c": 0.10629,
    "h": 18.3
  },
  "luminance": 0.02674
}

Semantic roles & 50–950 ramp

primary

#5B101B

secondary

#339486

accent

#EDD33B

background

#F9F5F5

surface

#F2E9E9

border

#CCC5C5

text

#0D0303

muted

#7E7878

Preview Lab

Preview with #5B101B

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

Preview Lab → · Contrast checker → · Palette generator →