#511B21#511B21

#511B21 is a dark, moderate red. Relative luminance 0.026; OKLCH L 30.8% C 0.081 H 16.6°. Best body text is #FFFFFF at 13.74:1 contrast (WCAG AA passes).

Color values

HEX	#511B21
RGB	rgb(81, 27, 33)
HSL	hsl(353, 50%, 21%)
HSV	hsv(353, 67%, 32%)
CMYK	cmyk(0%, 66.7%, 59.3%, 68.2%)
CIE-LAB	lab(18.56, 25.84, 9.25)
CIE-LCH	lch(18.56, 27.44, 19.70°)
OKLab	oklab(30.79% 0.0776 0.0231)
OKLCH	oklch(30.79% 0.081 16.6)
XYZ	xyz(4.0601, 2.6435, 1.7350)
Luminance	0.0264 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#511B21 #1B514B

analogous

#511B3C #511B21 #51301B

triadic

#511B21 #21511B #1B2151

tetradic

#511B21 #3C511B #1B514B #301B51

square

#511B21 #3C511B #1B514B #301B51

split-complementary

#511B21 #1B5130 #1B3C51

monochromatic

#170809 #230C0E #511B21 #7F2A34 #AD3A46

Accessibility & contrast

On white

13.74

#511B21 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.53

#511B21 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #511B21

13.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##511B21	#FFFFFF	#000000	##FFFFFF
##511B21	1.00	13.74	1.53	13.74
#FFFFFF	13.74	1.00	21.00	1.00
#000000	1.53	21.00	1.00	21.00
##FFFFFF	13.74	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#282621

Deuteranopia (green-blind)

#353120

Tritanopia (blue-blind)

#59121D

Achromatopsia (no color)

#2D2D2D

Design tokens & code

CSS

--color: #511b21;
/* rgb */ color: rgb(81, 27, 33);
/* oklch */ color: oklch(30.8% 0.081 16.6);

Tailwind

colors: {
  custom: {
    50: '#865a5c',
    500: '#511b21',
    950: '#000000',
  },
}

SCSS

$custom: #511b21;
$custom-light: #865a5c;
$custom-dark: #000000;

JSON

{
  "hex": "#511b21",
  "rgb": {
    "r": 81,
    "g": 27,
    "b": 33
  },
  "hsl": {
    "h": 353.333,
    "s": 50,
    "l": 21.176
  },
  "oklch": {
    "l": 0.30791,
    "c": 0.08093,
    "h": 16.6
  },
  "luminance": 0.02643
}

Semantic roles & 50–950 ramp

primary

#511B21

secondary

#41877F

accent

#DACA4E

background

#F8F5F5

surface

#F0E9E9

border

#CBC5C5

text

#0C0404

muted

#7D7979

Preview Lab

Preview with #511B21

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

Preview Lab → · Contrast checker → · Palette generator →