#511D1D#511D1D

#511D1D is a dark, moderate red. Relative luminance 0.027; OKLCH L 31.0% C 0.078 H 22.8°. Best body text is #FFFFFF at 13.61:1 contrast (WCAG AA passes).

Color values

HEX	#511D1D
RGB	rgb(81, 29, 29)
HSL	hsl(0, 47%, 22%)
HSV	hsv(0, 64%, 32%)
CMYK	cmyk(0%, 64.2%, 64.2%, 68.2%)
CIE-LAB	lab(18.87, 24.39, 12.47)
CIE-LCH	lch(18.87, 27.39, 27.08°)
OKLab	oklab(31% 0.0723 0.0304)
OKLCH	oklch(31% 0.078 22.8)
XYZ	xyz(4.0548, 2.7173, 1.4731)
Luminance	0.0272 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#511D1D #1D5151

analogous

#511D37 #511D1D #51371D

triadic

#511D1D #1D511D #1D1D51

tetradic

#511D1D #37511D #1D5151 #371D51

square

#511D1D #37511D #1D5151 #371D51

split-complementary

#511D1D #1D5137 #1D3751

monochromatic

#170808 #240D0D #511D1D #7E2D2D #AB3D3D

Accessibility & contrast

On white

13.61

#511D1D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.54

#511D1D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #511D1D

13.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##511D1D	#FFFFFF	#000000	##FFFFFF
##511D1D	1.00	13.61	1.54	13.61
#FFFFFF	13.61	1.00	21.00	1.00
#000000	1.54	21.00	1.00	21.00
##FFFFFF	13.61	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2A271D

Deuteranopia (green-blind)

#37321C

Tritanopia (blue-blind)

#59141D

Achromatopsia (no color)

#2E2E2E

Design tokens & code

CSS

--color: #511d1d;
/* rgb */ color: rgb(81, 29, 29);
/* oklch */ color: oklch(31.0% 0.078 22.8);

Tailwind

colors: {
  custom: {
    50: '#865b58',
    500: '#511d1d',
    950: '#000000',
  },
}

SCSS

$custom: #511d1d;
$custom-light: #865b58;
$custom-dark: #000000;

JSON

{
  "hex": "#511d1d",
  "rgb": {
    "r": 81,
    "g": 29,
    "b": 29
  },
  "hsl": {
    "h": 0,
    "s": 47.273,
    "l": 21.569
  },
  "oklch": {
    "l": 0.31001,
    "c": 0.07841,
    "h": 22.8
  },
  "luminance": 0.02717
}

Semantic roles & 50–950 ramp

primary

#511D1D

secondary

#448686

accent

#D7D751

background

#F8F5F5

surface

#F0E9E9

border

#CBC5C5

text

#0C0403

muted

#7D7978

Preview Lab

Preview with #511D1D

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

Preview Lab → · Contrast checker → · Palette generator →