#511B1D#511B1D

#511B1D is a dark, moderate red. Relative luminance 0.026; OKLCH L 30.7% C 0.081 H 21.0°. Best body text is #FFFFFF at 13.78:1 contrast (WCAG AA passes).

Color values

HEX	#511B1D
RGB	rgb(81, 27, 29)
HSL	hsl(358, 50%, 21%)
HSV	hsv(358, 67%, 32%)
CMYK	cmyk(0%, 66.7%, 64.2%, 68.2%)
CIE-LAB	lab(18.46, 25.48, 11.93)
CIE-LCH	lch(18.46, 28.13, 25.10°)
OKLab	oklab(30.69% 0.0757 0.0291)
OKLCH	oklch(30.69% 0.081 21)
XYZ	xyz(4.0074, 2.6224, 1.4573)
Luminance	0.0262 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#511B1D #1B514F

analogous

#511B38 #511B1D #51341B

triadic

#511B1D #1D511B #1B1D51

tetradic

#511B1D #38511B #1B514F #341B51

square

#511B1D #38511B #1B514F #341B51

split-complementary

#511B1D #1B5134 #1B3851

monochromatic

#170808 #230C0D #511B1D #7F2A2D #AD3A3E

Accessibility & contrast

On white

13.78

#511B1D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.52

#511B1D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #511B1D

13.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##511B1D	#FFFFFF	#000000	##FFFFFF
##511B1D	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)

#28261D

Deuteranopia (green-blind)

#36311C

Tritanopia (blue-blind)

#59111C

Achromatopsia (no color)

#2D2D2D

Design tokens & code

CSS

--color: #511b1d;
/* rgb */ color: rgb(81, 27, 29);
/* oklch */ color: oklch(30.7% 0.081 21.0);

Tailwind

colors: {
  custom: {
    50: '#865a58',
    500: '#511b1d',
    950: '#000000',
  },
}

SCSS

$custom: #511b1d;
$custom-light: #865a58;
$custom-dark: #000000;

JSON

{
  "hex": "#511b1d",
  "rgb": {
    "r": 81,
    "g": 27,
    "b": 29
  },
  "hsl": {
    "h": 357.778,
    "s": 50,
    "l": 21.176
  },
  "oklch": {
    "l": 0.30692,
    "c": 0.08112,
    "h": 21
  },
  "luminance": 0.02622
}

Semantic roles & 50–950 ramp

primary

#511B1D

secondary

#418784

accent

#DAD44E

background

#F8F5F5

surface

#F0E9E9

border

#CBC5C5

text

#0C0403

muted

#7D7978

Preview Lab

Preview with #511B1D

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

Preview Lab → · Contrast checker → · Palette generator →