#511C1C#511C1C

#511C1C is a dark, moderate red. Relative luminance 0.027; OKLCH L 30.8% C 0.080 H 23.0°. Best body text is #FFFFFF at 13.70:1 contrast (WCAG AA passes).

Color values

HEX	#511C1C
RGB	rgb(81, 28, 28)
HSL	hsl(0, 49%, 21%)
HSV	hsv(0, 65%, 32%)
CMYK	cmyk(0%, 65.4%, 65.4%, 68.2%)
CIE-LAB	lab(18.65, 24.85, 12.87)
CIE-LCH	lch(18.65, 27.99, 27.37°)
OKLab	oklab(30.82% 0.0736 0.0312)
OKLCH	oklch(30.82% 0.08 23)
XYZ	xyz(4.0186, 2.6642, 1.4010)
Luminance	0.0266 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#511C1C #1C5151

analogous

#511C37 #511C1C #51371C

triadic

#511C1C #1C511C #1C1C51

tetradic

#511C1C #37511C #1C5151 #371C51

square

#511C1C #37511C #1C5151 #371C51

split-complementary

#511C1C #1C5137 #1C3751

monochromatic

#170808 #240C0C #511C1C #7E2C2C #AC3B3B

Accessibility & contrast

On white

13.70

#511C1C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.53

#511C1C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #511C1C

13.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##511C1C	#FFFFFF	#000000	##FFFFFF
##511C1C	1.00	13.70	1.53	13.70
#FFFFFF	13.70	1.00	21.00	1.00
#000000	1.53	21.00	1.00	21.00
##FFFFFF	13.70	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#29261C

Deuteranopia (green-blind)

#37321B

Tritanopia (blue-blind)

#59121D

Achromatopsia (no color)

#2D2D2D

Design tokens & code

CSS

--color: #511c1c;
/* rgb */ color: rgb(81, 28, 28);
/* oklch */ color: oklch(30.8% 0.080 23.0);

Tailwind

colors: {
  custom: {
    50: '#865b58',
    500: '#511c1c',
    950: '#000000',
  },
}

SCSS

$custom: #511c1c;
$custom-light: #865b58;
$custom-dark: #000000;

JSON

{
  "hex": "#511c1c",
  "rgb": {
    "r": 81,
    "g": 28,
    "b": 28
  },
  "hsl": {
    "h": 0,
    "s": 48.624,
    "l": 21.373
  },
  "oklch": {
    "l": 0.30822,
    "c": 0.07989,
    "h": 23
  },
  "luminance": 0.02664
}

Semantic roles & 50–950 ramp

primary

#511C1C

secondary

#428787

accent

#D8D850

background

#F8F5F5

surface

#F0E9E9

border

#CBC5C5

text

#0C0403

muted

#7D7978

Preview Lab

Preview with #511C1C

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

Preview Lab → · Contrast checker → · Palette generator →