#511F1B#511F1B

#511F1B is a dark, moderate red. Relative luminance 0.028; OKLCH L 31.3% C 0.076 H 26.9°. Best body text is #FFFFFF at 13.45:1 contrast (WCAG AA passes).

Color values

HEX	#511F1B
RGB	rgb(81, 31, 27)
HSL	hsl(4, 50%, 21%)
HSV	hsv(4, 67%, 32%)
CMYK	cmyk(0%, 61.7%, 66.7%, 68.2%)
CIE-LAB	lab(19.26, 23.10, 14.35)
CIE-LCH	lch(19.26, 27.19, 31.84°)
OKLab	oklab(31.28% 0.0678 0.0345)
OKLCH	oklch(31.28% 0.076 26.9)
XYZ	xyz(4.0815, 2.8089, 1.3639)
Luminance	0.0281 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#511F1B #1B4D51

analogous

#511B32 #511F1B #513A1B

triadic

#511F1B #1B511F #1F1B51

tetradic

#511F1B #32511B #1B4D51 #3A1B51

square

#511F1B #32511B #1B4D51 #3A1B51

split-complementary

#511F1B #1B513A #1B3251

monochromatic

#170908 #230D0C #511F1B #7F312A #AD423A

Accessibility & contrast

On white

13.45

#511F1B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.56

#511F1B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #511F1B

13.45:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##511F1B	#FFFFFF	#000000	##FFFFFF
##511F1B	1.00	13.45	1.56	13.45
#FFFFFF	13.45	1.00	21.00	1.00
#000000	1.56	21.00	1.00	21.00
##FFFFFF	13.45	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2C281A

Deuteranopia (green-blind)

#38331A

Tritanopia (blue-blind)

#59161E

Achromatopsia (no color)

#2F2F2F

Design tokens & code

CSS

--color: #511f1b;
/* rgb */ color: rgb(81, 31, 27);
/* oklch */ color: oklch(31.3% 0.076 26.9);

Tailwind

colors: {
  custom: {
    50: '#865c57',
    500: '#511f1b',
    950: '#000000',
  },
}

SCSS

$custom: #511f1b;
$custom-light: #865c57;
$custom-dark: #000000;

JSON

{
  "hex": "#511f1b",
  "rgb": {
    "r": 81,
    "g": 31,
    "b": 27
  },
  "hsl": {
    "h": 4.444,
    "s": 50,
    "l": 21.176
  },
  "oklch": {
    "l": 0.31281,
    "c": 0.0761,
    "h": 26.9
  },
  "luminance": 0.02808
}

Semantic roles & 50–950 ramp

primary

#511F1B

secondary

#418287

accent

#CFDA4E

background

#F8F5F5

surface

#F0E9E9

border

#CBC5C5

text

#0C0403

muted

#7D7978

Preview Lab

Preview with #511F1B

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

Preview Lab → · Contrast checker → · Palette generator →