#511B15#511B15

#511B15 is a dark, moderate red. Relative luminance 0.026; OKLCH L 30.5% C 0.083 H 29.1°. Best body text is #FFFFFF at 13.84:1 contrast (WCAG AA passes).

Color values

HEX	#511B15
RGB	rgb(81, 27, 21)
HSL	hsl(6, 59%, 20%)
HSV	hsv(6, 74%, 32%)
CMYK	cmyk(0%, 66.7%, 74.1%, 68.2%)
CIE-LAB	lab(18.31, 24.87, 17.24)
CIE-LCH	lch(18.31, 30.26, 34.73°)
OKLab	oklab(30.53% 0.0721 0.0401)
OKLCH	oklch(30.53% 0.083 29.1)
XYZ	xyz(3.9210, 2.5879, 1.0024)
Luminance	0.0259 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#511B15 #154B51

analogous

#51152D #511B15 #513915

triadic

#511B15 #15511B #1B1551

tetradic

#511B15 #2D5115 #154B51 #391551

square

#511B15 #2D5115 #154B51 #391551

split-complementary

#511B15 #155139 #152D51

monochromatic

#180806 #200B08 #511B15 #822B22 #B23B2E

Accessibility & contrast

On white

13.84

#511B15 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.52

#511B15 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #511B15

13.84:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##511B15	#FFFFFF	#000000	##FFFFFF
##511B15	1.00	13.84	1.52	13.84
#FFFFFF	13.84	1.00	21.00	1.00
#000000	1.52	21.00	1.00	21.00
##FFFFFF	13.84	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#292514

Deuteranopia (green-blind)

#373114

Tritanopia (blue-blind)

#5A0F1A

Achromatopsia (no color)

#2D2D2D

Design tokens & code

CSS

--color: #511b15;
/* rgb */ color: rgb(81, 27, 21);
/* oklch */ color: oklch(30.5% 0.083 29.1);

Tailwind

colors: {
  custom: {
    50: '#875a52',
    500: '#511b15',
    950: '#000000',
  },
}

SCSS

$custom: #511b15;
$custom-light: #875a52;
$custom-dark: #000000;

JSON

{
  "hex": "#511b15",
  "rgb": {
    "r": 81,
    "g": 27,
    "b": 21
  },
  "hsl": {
    "h": 6,
    "s": 58.824,
    "l": 20
  },
  "oklch": {
    "l": 0.30528,
    "c": 0.0825,
    "h": 29.1
  },
  "luminance": 0.02587
}

Semantic roles & 50–950 ramp

primary

#511B15

secondary

#398189

accent

#D2E246

background

#F8F5F4

surface

#F0E9E7

border

#CBC5C3

text

#0C0402

muted

#7D7978

Preview Lab

Preview with #511B15

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

Preview Lab → · Contrast checker → · Palette generator →