#5B101D#5B101D

#5B101D is a dark, moderate red. Relative luminance 0.027; OKLCH L 31.3% C 0.106 H 16.7°. Best body text is #FFFFFF at 13.67:1 contrast (WCAG AA passes).

Color values

HEX	#5B101D
RGB	rgb(91, 16, 29)
HSL	hsl(350, 70%, 21%)
HSV	hsv(350, 82%, 36%)
CMYK	cmyk(0%, 82.4%, 68.1%, 64.3%)
CIE-LAB	lab(18.73, 34.10, 12.68)
CIE-LCH	lch(18.73, 36.38, 20.39°)
OKLab	oklab(31.28% 0.1018 0.0306)
OKLCH	oklch(31.28% 0.106 16.7)
XYZ	xyz(4.7219, 2.6841, 1.4316)
Luminance	0.0268 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5B101D #105B4E

analogous

#5B1042 #5B101D #5B2810

triadic

#5B101D #1D5B10 #101D5B

tetradic

#5B101D #425B10 #105B4E #28105B

square

#5B101D #425B10 #105B4E #28105B

split-complementary

#5B101D #105B28 #10425B

monochromatic

#1A0508 #27070C #5B101D #8F192E #C3223E

Accessibility & contrast

On white

13.67

#5B101D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.54

#5B101D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #5B101D

13.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5B101D	#FFFFFF	#000000	##FFFFFF
##5B101D	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)

#25241D

Deuteranopia (green-blind)

#38331B

Tritanopia (blue-blind)

#640016

Achromatopsia (no color)

#2E2E2E

Design tokens & code

CSS

--color: #5b101d;
/* rgb */ color: rgb(91, 16, 29);
/* oklch */ color: oklch(31.3% 0.106 16.7);

Tailwind

colors: {
  custom: {
    50: '#8f5658',
    500: '#5b101d',
    950: '#000000',
  },
}

SCSS

$custom: #5b101d;
$custom-light: #8f5658;
$custom-dark: #000000;

JSON

{
  "hex": "#5b101d",
  "rgb": {
    "r": 91,
    "g": 16,
    "b": 29
  },
  "hsl": {
    "h": 349.6,
    "s": 70.093,
    "l": 20.98
  },
  "oklch": {
    "l": 0.31275,
    "c": 0.10628,
    "h": 16.7
  },
  "luminance": 0.02683
}

Semantic roles & 50–950 ramp

primary

#5B101D

secondary

#339483

accent

#EDCE3B

background

#F9F5F5

surface

#F2E9E9

border

#CCC5C5

text

#0D0303

muted

#7E7878

Preview Lab

Preview with #5B101D

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

Preview Lab → · Contrast checker → · Palette generator →