#5B101C#5B101C

#5B101C is a dark, moderate red. Relative luminance 0.027; OKLCH L 31.3% C 0.106 H 17.5°. Best body text is #FFFFFF at 13.67:1 contrast (WCAG AA passes).

Color values

HEX	#5B101C
RGB	rgb(91, 16, 28)
HSL	hsl(350, 70%, 21%)
HSV	hsv(350, 82%, 36%)
CMYK	cmyk(0%, 82.4%, 69.2%, 64.3%)
CIE-LAB	lab(18.71, 34.03, 13.36)
CIE-LCH	lch(18.71, 36.56, 21.43°)
OKLab	oklab(31.25% 0.1014 0.032)
OKLCH	oklch(31.25% 0.106 17.5)
XYZ	xyz(4.7098, 2.6793, 1.3675)
Luminance	0.0268 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5B101C #105B4F

analogous

#5B1041 #5B101C #5B2910

triadic

#5B101C #1C5B10 #101C5B

tetradic

#5B101C #415B10 #105B4F #29105B

square

#5B101C #415B10 #105B4F #29105B

split-complementary

#5B101C #105B29 #10415B

monochromatic

#1A0508 #27070C #5B101C #8F192C #C3223C

Accessibility & contrast

On white

13.67

#5B101C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.54

#5B101C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #5B101C

13.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5B101C	#FFFFFF	#000000	##FFFFFF
##5B101C	1.00	13.67	1.54	13.67
#FFFFFF	13.67	1.00	21.00	1.00
#000000	1.54	21.00	1.00	21.00
##FFFFFF	13.67	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#26231C

Deuteranopia (green-blind)

#39331A

Tritanopia (blue-blind)

#650015

Achromatopsia (no color)

#2E2E2E

Design tokens & code

CSS

--color: #5b101c;
/* rgb */ color: rgb(91, 16, 28);
/* oklch */ color: oklch(31.3% 0.106 17.5);

Tailwind

colors: {
  custom: {
    50: '#8f5657',
    500: '#5b101c',
    950: '#000000',
  },
}

SCSS

$custom: #5b101c;
$custom-light: #8f5657;
$custom-dark: #000000;

JSON

{
  "hex": "#5b101c",
  "rgb": {
    "r": 91,
    "g": 16,
    "b": 28
  },
  "hsl": {
    "h": 350.4,
    "s": 70.093,
    "l": 20.98
  },
  "oklch": {
    "l": 0.31253,
    "c": 0.10628,
    "h": 17.5
  },
  "luminance": 0.02679
}

Semantic roles & 50–950 ramp

primary

#5B101C

secondary

#339485

accent

#EDD03B

background

#F9F5F5

surface

#F2E9E9

border

#CCC5C5

text

#0D0303

muted

#7E7878

Preview Lab

Preview with #5B101C

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

Preview Lab → · Contrast checker → · Palette generator →