#511D1F#511D1F

#511D1F is a dark, moderate red. Relative luminance 0.027; OKLCH L 31.0% C 0.078 H 20.5°. Best body text is #FFFFFF at 13.59:1 contrast (WCAG AA passes).

Color values

HEX	#511D1F
RGB	rgb(81, 29, 31)
HSL	hsl(358, 47%, 22%)
HSV	hsv(358, 64%, 32%)
CMYK	cmyk(0%, 64.2%, 61.7%, 68.2%)
CIE-LAB	lab(18.92, 24.57, 11.14)
CIE-LCH	lch(18.92, 26.97, 24.39°)
OKLab	oklab(31.05% 0.0732 0.0274)
OKLCH	oklch(31.05% 0.078 20.5)
XYZ	xyz(4.0804, 2.7275, 1.6076)
Luminance	0.0273 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#511D1F #1D514F

analogous

#511D39 #511D1F #51351D

triadic

#511D1F #1F511D #1D1F51

tetradic

#511D1F #39511D #1D514F #351D51

square

#511D1F #39511D #1D514F #351D51

split-complementary

#511D1F #1D5135 #1D3951

monochromatic

#170809 #240D0E #511D1F #7E2D30 #AB3D41

Accessibility & contrast

On white

13.59

#511D1F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.55

#511D1F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #511D1F

13.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##511D1F	#FFFFFF	#000000	##FFFFFF
##511D1F	1.00	13.59	1.55	13.59
#FFFFFF	13.59	1.00	21.00	1.00
#000000	1.55	21.00	1.00	21.00
##FFFFFF	13.59	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#29271F

Deuteranopia (green-blind)

#37321E

Tritanopia (blue-blind)

#59141E

Achromatopsia (no color)

#2E2E2E

Design tokens & code

CSS

--color: #511d1f;
/* rgb */ color: rgb(81, 29, 31);
/* oklch */ color: oklch(31.0% 0.078 20.5);

Tailwind

colors: {
  custom: {
    50: '#865b5a',
    500: '#511d1f',
    950: '#000000',
  },
}

SCSS

$custom: #511d1f;
$custom-light: #865b5a;
$custom-dark: #000000;

JSON

{
  "hex": "#511d1f",
  "rgb": {
    "r": 81,
    "g": 29,
    "b": 31
  },
  "hsl": {
    "h": 357.692,
    "s": 47.273,
    "l": 21.569
  },
  "oklch": {
    "l": 0.31048,
    "c": 0.07819,
    "h": 20.5
  },
  "luminance": 0.02727
}

Semantic roles & 50–950 ramp

primary

#511D1F

secondary

#448684

accent

#D7D251

background

#F8F5F5

surface

#F0E9E9

border

#CBC5C5

text

#0C0403

muted

#7D7978

Preview Lab

Preview with #511D1F

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

Preview Lab → · Contrast checker → · Palette generator →