#511B1A#511B1A

#511B1A is a dark, moderate red. Relative luminance 0.026; OKLCH L 30.6% C 0.082 H 24.2°. Best body text is #FFFFFF at 13.80:1 contrast (WCAG AA passes).

Color values

HEX	#511B1A
RGB	rgb(81, 27, 26)
HSL	hsl(1, 51%, 21%)
HSV	hsv(1, 68%, 32%)
CMYK	cmyk(0%, 66.7%, 67.9%, 68.2%)
CIE-LAB	lab(18.40, 25.23, 13.94)
CIE-LCH	lch(18.40, 28.82, 28.92°)
OKLab	oklab(30.63% 0.0743 0.0334)
OKLCH	oklch(30.63% 0.082 24.2)
XYZ	xyz(3.9721, 2.6083, 1.2714)
Luminance	0.0261 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#511B1A #1A5051

analogous

#511A34 #511B1A #51361A

triadic

#511B1A #1A511B #1B1A51

tetradic

#511B1A #34511A #1A5051 #361A51

square

#511B1A #34511A #1A5051 #361A51

split-complementary

#511B1A #1A5136 #1A3451

monochromatic

#170807 #230C0B #511B1A #7F2A29 #AE3A38

Accessibility & contrast

On white

13.80

#511B1A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.52

#511B1A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #511B1A

13.80:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##511B1A	#FFFFFF	#000000	##FFFFFF
##511B1A	1.00	13.80	1.52	13.80
#FFFFFF	13.80	1.00	21.00	1.00
#000000	1.52	21.00	1.00	21.00
##FFFFFF	13.80	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#292619

Deuteranopia (green-blind)

#363119

Tritanopia (blue-blind)

#59101B

Achromatopsia (no color)

#2D2D2D

Design tokens & code

CSS

--color: #511b1a;
/* rgb */ color: rgb(81, 27, 26);
/* oklch */ color: oklch(30.6% 0.082 24.2);

Tailwind

colors: {
  custom: {
    50: '#865a56',
    500: '#511b1a',
    950: '#000000',
  },
}

SCSS

$custom: #511b1a;
$custom-light: #865a56;
$custom-dark: #000000;

JSON

{
  "hex": "#511b1a",
  "rgb": {
    "r": 81,
    "g": 27,
    "b": 26
  },
  "hsl": {
    "h": 1.091,
    "s": 51.402,
    "l": 20.98
  },
  "oklch": {
    "l": 0.30625,
    "c": 0.0815,
    "h": 24.2
  },
  "luminance": 0.02608
}

Semantic roles & 50–950 ramp

primary

#511B1A

secondary

#408687

accent

#D8DB4D

background

#F8F5F5

surface

#F0E9E9

border

#CBC5C5

text

#0C0403

muted

#7D7978

Preview Lab

Preview with #511B1A

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

Preview Lab → · Contrast checker → · Palette generator →