#511C1F#511C1F

#511C1F is a dark, moderate red. Relative luminance 0.027; OKLCH L 30.9% C 0.080 H 19.7°. Best body text is #FFFFFF at 13.67:1 contrast (WCAG AA passes).

Color values

HEX	#511C1F
RGB	rgb(81, 28, 31)
HSL	hsl(357, 49%, 21%)
HSV	hsv(357, 65%, 32%)
CMYK	cmyk(0%, 65.4%, 61.7%, 68.2%)
CIE-LAB	lab(18.71, 25.11, 10.86)
CIE-LCH	lch(18.71, 27.36, 23.39°)
OKLab	oklab(30.89% 0.0749 0.0268)
OKLCH	oklch(30.89% 0.08 19.7)
XYZ	xyz(4.0563, 2.6793, 1.5996)
Luminance	0.0268 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#511C1F #1C514E

analogous

#511C3A #511C1F #51341C

triadic

#511C1F #1F511C #1C1F51

tetradic

#511C1F #3A511C #1C514E #341C51

square

#511C1F #3A511C #1C514E #341C51

split-complementary

#511C1F #1C5134 #1C3A51

monochromatic

#170809 #240C0E #511C1F #7E2C30 #AC3B42

Accessibility & contrast

On white

13.67

#511C1F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.54

#511C1F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #511C1F

13.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##511C1F	#FFFFFF	#000000	##FFFFFF
##511C1F	1.00	13.67	1.54	13.67
#FFFFFF	13.67	1.00	21.00	1.00
#000000	1.54	21.00	1.00	21.00
##FFFFFF	13.67	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#29271F

Deuteranopia (green-blind)

#36321E

Tritanopia (blue-blind)

#59131D

Achromatopsia (no color)

#2E2E2E

Design tokens & code

CSS

--color: #511c1f;
/* rgb */ color: rgb(81, 28, 31);
/* oklch */ color: oklch(30.9% 0.080 19.7);

Tailwind

colors: {
  custom: {
    50: '#865b5a',
    500: '#511c1f',
    950: '#000000',
  },
}

SCSS

$custom: #511c1f;
$custom-light: #865b5a;
$custom-dark: #000000;

JSON

{
  "hex": "#511c1f",
  "rgb": {
    "r": 81,
    "g": 28,
    "b": 31
  },
  "hsl": {
    "h": 356.604,
    "s": 48.624,
    "l": 21.373
  },
  "oklch": {
    "l": 0.30892,
    "c": 0.07958,
    "h": 19.7
  },
  "luminance": 0.02679
}

Semantic roles & 50–950 ramp

primary

#511C1F

secondary

#428783

accent

#D8D050

background

#F8F5F5

surface

#F0E9E9

border

#CBC5C5

text

#0C0403

muted

#7D7978

Preview Lab

Preview with #511C1F

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

Preview Lab → · Contrast checker → · Palette generator →