#511A1B#511A1B

#511A1B is a dark, moderate red. Relative luminance 0.026; OKLCH L 30.5% C 0.083 H 22.3°. Best body text is #FFFFFF at 13.88:1 contrast (WCAG AA passes).

Color values

HEX	#511A1B
RGB	rgb(81, 26, 27)
HSL	hsl(359, 51%, 21%)
HSV	hsv(359, 68%, 32%)
CMYK	cmyk(0%, 67.9%, 66.7%, 68.2%)
CIE-LAB	lab(18.22, 25.84, 13.02)
CIE-LCH	lch(18.22, 28.93, 26.74°)
OKLab	oklab(30.5% 0.0765 0.0314)
OKLCH	oklch(30.5% 0.083 22.3)
XYZ	xyz(3.9609, 2.5678, 1.3238)
Luminance	0.0257 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#511A1B #1A5150

analogous

#511A36 #511A1B #51341A

triadic

#511A1B #1B511A #1A1B51

tetradic

#511A1B #36511A #1A5150 #341A51

square

#511A1B #36511A #1A5150 #341A51

split-complementary

#511A1B #1A5134 #1A3651

monochromatic

#170708 #230B0C #511A1B #7F292A #AE383A

Accessibility & contrast

On white

13.88

#511A1B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.51

#511A1B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #511A1B

13.88:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##511A1B	#FFFFFF	#000000	##FFFFFF
##511A1B	1.00	13.88	1.51	13.88
#FFFFFF	13.88	1.00	21.00	1.00
#000000	1.51	21.00	1.00	21.00
##FFFFFF	13.88	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#28251B

Deuteranopia (green-blind)

#36311A

Tritanopia (blue-blind)

#590F1B

Achromatopsia (no color)

#2C2C2C

Design tokens & code

CSS

--color: #511a1b;
/* rgb */ color: rgb(81, 26, 27);
/* oklch */ color: oklch(30.5% 0.083 22.3);

Tailwind

colors: {
  custom: {
    50: '#865957',
    500: '#511a1b',
    950: '#000000',
  },
}

SCSS

$custom: #511a1b;
$custom-light: #865957;
$custom-dark: #000000;

JSON

{
  "hex": "#511a1b",
  "rgb": {
    "r": 81,
    "g": 26,
    "b": 27
  },
  "hsl": {
    "h": 358.909,
    "s": 51.402,
    "l": 20.98
  },
  "oklch": {
    "l": 0.30497,
    "c": 0.08267,
    "h": 22.3
  },
  "luminance": 0.02567
}

Semantic roles & 50–950 ramp

primary

#511A1B

secondary

#408786

accent

#DBD84D

background

#F8F5F5

surface

#F0E9E9

border

#CBC5C5

text

#0C0403

muted

#7D7978

Preview Lab

Preview with #511A1B

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

Preview Lab → · Contrast checker → · Palette generator →