#511E1B#511E1B

#511E1B is a dark, moderate red. Relative luminance 0.028; OKLCH L 31.1% C 0.077 H 25.9°. Best body text is #FFFFFF at 13.54:1 contrast (WCAG AA passes).

Color values

HEX	#511E1B
RGB	rgb(81, 30, 27)
HSL	hsl(3, 50%, 21%)
HSV	hsv(3, 67%, 32%)
CMYK	cmyk(0%, 63%, 66.7%, 68.2%)
CIE-LAB	lab(19.05, 23.67, 14.07)
CIE-LCH	lch(19.05, 27.53, 30.74°)
OKLab	oklab(31.12% 0.0696 0.0338)
OKLCH	oklch(31.12% 0.077 25.9)
XYZ	xyz(4.0558, 2.7575, 1.3554)
Luminance	0.0276 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#511E1B #1B4E51

analogous

#511B33 #511E1B #51391B

triadic

#511E1B #1B511E #1E1B51

tetradic

#511E1B #33511B #1B4E51 #391B51

square

#511E1B #33511B #1B4E51 #391B51

split-complementary

#511E1B #1B5139 #1B3351

monochromatic

#170808 #230D0C #511E1B #7F2F2A #AD403A

Accessibility & contrast

On white

13.54

#511E1B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.55

#511E1B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #511E1B

13.54:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##511E1B	#FFFFFF	#000000	##FFFFFF
##511E1B	1.00	13.54	1.55	13.54
#FFFFFF	13.54	1.00	21.00	1.00
#000000	1.55	21.00	1.00	21.00
##FFFFFF	13.54	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2B271A

Deuteranopia (green-blind)

#38321A

Tritanopia (blue-blind)

#59151E

Achromatopsia (no color)

#2E2E2E

Design tokens & code

CSS

--color: #511e1b;
/* rgb */ color: rgb(81, 30, 27);
/* oklch */ color: oklch(31.1% 0.077 25.9);

Tailwind

colors: {
  custom: {
    50: '#865c57',
    500: '#511e1b',
    950: '#000000',
  },
}

SCSS

$custom: #511e1b;
$custom-light: #865c57;
$custom-dark: #000000;

JSON

{
  "hex": "#511e1b",
  "rgb": {
    "r": 81,
    "g": 30,
    "b": 27
  },
  "hsl": {
    "h": 3.333,
    "s": 50,
    "l": 21.176
  },
  "oklch": {
    "l": 0.31117,
    "c": 0.07741,
    "h": 25.9
  },
  "luminance": 0.02757
}

Semantic roles & 50–950 ramp

primary

#511E1B

secondary

#418387

accent

#D2DA4E

background

#F8F5F5

surface

#F0E9E9

border

#CBC5C5

text

#0C0403

muted

#7D7978

Preview Lab

Preview with #511E1B

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

Preview Lab → · Contrast checker → · Palette generator →