#511B1C#511B1C

#511B1C is a dark, moderate red. Relative luminance 0.026; OKLCH L 30.7% C 0.081 H 22.1°. Best body text is #FFFFFF at 13.78:1 contrast (WCAG AA passes).

Color values

HEX	#511B1C
RGB	rgb(81, 27, 28)
HSL	hsl(359, 50%, 21%)
HSV	hsv(359, 67%, 32%)
CMYK	cmyk(0%, 66.7%, 65.4%, 68.2%)
CIE-LAB	lab(18.44, 25.39, 12.60)
CIE-LCH	lch(18.44, 28.35, 26.40°)
OKLab	oklab(30.67% 0.0753 0.0306)
OKLCH	oklch(30.67% 0.081 22.1)
XYZ	xyz(3.9952, 2.6176, 1.3932)
Luminance	0.0262 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#511B1C #1B5150

analogous

#511B37 #511B1C #51351B

triadic

#511B1C #1C511B #1B1C51

tetradic

#511B1C #37511B #1B5150 #351B51

square

#511B1C #37511B #1B5150 #351B51

split-complementary

#511B1C #1B5135 #1B3751

monochromatic

#170808 #230C0C #511B1C #7F2A2C #AD3A3C

Accessibility & contrast

On white

13.78

#511B1C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.52

#511B1C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #511B1C

13.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##511B1C	#FFFFFF	#000000	##FFFFFF
##511B1C	1.00	13.78	1.52	13.78
#FFFFFF	13.78	1.00	21.00	1.00
#000000	1.52	21.00	1.00	21.00
##FFFFFF	13.78	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#28261C

Deuteranopia (green-blind)

#36311B

Tritanopia (blue-blind)

#59111C

Achromatopsia (no color)

#2D2D2D

Design tokens & code

CSS

--color: #511b1c;
/* rgb */ color: rgb(81, 27, 28);
/* oklch */ color: oklch(30.7% 0.081 22.1);

Tailwind

colors: {
  custom: {
    50: '#865a58',
    500: '#511b1c',
    950: '#000000',
  },
}

SCSS

$custom: #511b1c;
$custom-light: #865a58;
$custom-dark: #000000;

JSON

{
  "hex": "#511b1c",
  "rgb": {
    "r": 81,
    "g": 27,
    "b": 28
  },
  "hsl": {
    "h": 358.889,
    "s": 50,
    "l": 21.176
  },
  "oklch": {
    "l": 0.30669,
    "c": 0.08123,
    "h": 22.1
  },
  "luminance": 0.02617
}

Semantic roles & 50–950 ramp

primary

#511B1C

secondary

#418786

accent

#DAD74E

background

#F8F5F5

surface

#F0E9E9

border

#CBC5C5

text

#0C0403

muted

#7D7978

Preview Lab

Preview with #511B1C

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

Preview Lab → · Contrast checker → · Palette generator →