#511C1D#511C1D

#511C1D is a dark, moderate red. Relative luminance 0.027; OKLCH L 30.8% C 0.080 H 21.9°. Best body text is #FFFFFF at 13.69:1 contrast (WCAG AA passes).

Color values

HEX	#511C1D
RGB	rgb(81, 28, 29)
HSL	hsl(359, 49%, 21%)
HSV	hsv(359, 65%, 32%)
CMYK	cmyk(0%, 65.4%, 64.2%, 68.2%)
CIE-LAB	lab(18.67, 24.94, 12.20)
CIE-LCH	lch(18.67, 27.76, 26.07°)
OKLab	oklab(30.85% 0.074 0.0297)
OKLCH	oklch(30.85% 0.08 21.9)
XYZ	xyz(4.0307, 2.6691, 1.4651)
Luminance	0.0267 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#511C1D #1C5150

analogous

#511C38 #511C1D #51361C

triadic

#511C1D #1D511C #1C1D51

tetradic

#511C1D #38511C #1C5150 #361C51

square

#511C1D #38511C #1C5150 #361C51

split-complementary

#511C1D #1C5136 #1C3851

monochromatic

#170808 #240C0D #511C1D #7E2C2D #AC3B3E

Accessibility & contrast

On white

13.69

#511C1D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.53

#511C1D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #511C1D

13.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##511C1D	#FFFFFF	#000000	##FFFFFF
##511C1D	1.00	13.69	1.53	13.69
#FFFFFF	13.69	1.00	21.00	1.00
#000000	1.53	21.00	1.00	21.00
##FFFFFF	13.69	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#29261D

Deuteranopia (green-blind)

#36321C

Tritanopia (blue-blind)

#59121D

Achromatopsia (no color)

#2D2D2D

Design tokens & code

CSS

--color: #511c1d;
/* rgb */ color: rgb(81, 28, 29);
/* oklch */ color: oklch(30.8% 0.080 21.9);

Tailwind

colors: {
  custom: {
    50: '#865b58',
    500: '#511c1d',
    950: '#000000',
  },
}

SCSS

$custom: #511c1d;
$custom-light: #865b58;
$custom-dark: #000000;

JSON

{
  "hex": "#511c1d",
  "rgb": {
    "r": 81,
    "g": 28,
    "b": 29
  },
  "hsl": {
    "h": 358.868,
    "s": 48.624,
    "l": 21.373
  },
  "oklch": {
    "l": 0.30845,
    "c": 0.07976,
    "h": 21.9
  },
  "luminance": 0.02669
}

Semantic roles & 50–950 ramp

primary

#511C1D

secondary

#428785

accent

#D8D650

background

#F8F5F5

surface

#F0E9E9

border

#CBC5C5

text

#0C0403

muted

#7D7978

Preview Lab

Preview with #511C1D

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

Preview Lab → · Contrast checker → · Palette generator →