#511C1B#511C1B

#511C1B is a dark, moderate red. Relative luminance 0.027; OKLCH L 30.8% C 0.080 H 24.1°. Best body text is #FFFFFF at 13.71:1 contrast (WCAG AA passes).

Color values

HEX	#511C1B
RGB	rgb(81, 28, 27)
HSL	hsl(1, 50%, 21%)
HSV	hsv(1, 67%, 32%)
CMYK	cmyk(0%, 65.4%, 66.7%, 68.2%)
CIE-LAB	lab(18.63, 24.77, 13.53)
CIE-LCH	lch(18.63, 28.23, 28.65°)
OKLab	oklab(30.8% 0.0731 0.0326)
OKLCH	oklch(30.8% 0.08 24.1)
XYZ	xyz(4.0068, 2.6595, 1.3390)
Luminance	0.0266 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#511C1B #1B5051

analogous

#511B35 #511C1B #51371B

triadic

#511C1B #1B511C #1C1B51

tetradic

#511C1B #35511B #1B5051 #371B51

square

#511C1B #35511B #1B5051 #371B51

split-complementary

#511C1B #1B5137 #1B3551

monochromatic

#170808 #230C0C #511C1B #7F2C2A #AD3C3A

Accessibility & contrast

On white

13.71

#511C1B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.53

#511C1B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #511C1B

13.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##511C1B	#FFFFFF	#000000	##FFFFFF
##511C1B	1.00	13.71	1.53	13.71
#FFFFFF	13.71	1.00	21.00	1.00
#000000	1.53	21.00	1.00	21.00
##FFFFFF	13.71	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#29261B

Deuteranopia (green-blind)

#37321A

Tritanopia (blue-blind)

#59121C

Achromatopsia (no color)

#2D2D2D

Design tokens & code

CSS

--color: #511c1b;
/* rgb */ color: rgb(81, 28, 27);
/* oklch */ color: oklch(30.8% 0.080 24.1);

Tailwind

colors: {
  custom: {
    50: '#865b57',
    500: '#511c1b',
    950: '#000000',
  },
}

SCSS

$custom: #511c1b;
$custom-light: #865b57;
$custom-dark: #000000;

JSON

{
  "hex": "#511c1b",
  "rgb": {
    "r": 81,
    "g": 28,
    "b": 27
  },
  "hsl": {
    "h": 1.111,
    "s": 50,
    "l": 21.176
  },
  "oklch": {
    "l": 0.308,
    "c": 0.08004,
    "h": 24.1
  },
  "luminance": 0.02659
}

Semantic roles & 50–950 ramp

primary

#511C1B

secondary

#418687

accent

#D7DA4E

background

#F8F5F5

surface

#F0E9E9

border

#CBC5C5

text

#0C0403

muted

#7D7978

Preview Lab

Preview with #511C1B

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

Preview Lab → · Contrast checker → · Palette generator →