#A63B1D#A63B1D

#A63B1D is a mid, vivid red. Relative luminance 0.113; OKLCH L 50.0% C 0.147 H 36.0°. Best body text is #FFFFFF at 6.43:1 contrast (WCAG AA passes).

Color values

HEX	#A63B1D
RGB	rgb(166, 59, 29)
HSL	hsl(13, 70%, 38%)
HSV	hsv(13, 83%, 65%)
CMYK	cmyk(0%, 64.5%, 82.5%, 34.9%)
CIE-LAB	lab(40.12, 42.61, 40.49)
CIE-LCH	lch(40.12, 58.77, 43.54°)
OKLab	oklab(50% 0.1192 0.0867)
OKLCH	oklch(50% 0.147 36)
XYZ	xyz(17.5136, 11.3262, 2.4261)
Luminance	0.1132 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#A63B1D #1D88A6

analogous

#A61D43 #A63B1D #A67F1D

triadic

#A63B1D #1DA63B #3B1DA6

tetradic

#A63B1D #43A61D #1D88A6 #7F1DA6

square

#A63B1D #43A61D #1D88A6 #7F1DA6

split-complementary

#A63B1D #1DA67F #1D43A6

monochromatic

#3E160B #722814 #A63B1D #D94E27 #E2795B

Accessibility & contrast

On white

6.43

#A63B1D on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.26

#A63B1D on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #A63B1D

6.43:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##A63B1D	#FFFFFF	#000000	##FFFFFF
##A63B1D	1.00	6.43	3.26	6.43
#FFFFFF	6.43	1.00	21.00	1.00
#000000	3.26	21.00	1.00	21.00
##FFFFFF	6.43	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5A5018

Deuteranopia (green-blind)

#746718

Tritanopia (blue-blind)

#B71D35

Achromatopsia (no color)

#5F5F5F

Design tokens & code

CSS

--color: #a63b1d;
/* rgb */ color: rgb(166, 59, 29);
/* oklch */ color: oklch(50.0% 0.147 36.0);

Tailwind

colors: {
  custom: {
    50: '#c9765c',
    500: '#a63b1d',
    950: '#000000',
  },
}

SCSS

$custom: #a63b1d;
$custom-light: #c9765c;
$custom-dark: #000000;

JSON

{
  "hex": "#a63b1d",
  "rgb": {
    "r": 166,
    "g": 59,
    "b": 29
  },
  "hsl": {
    "h": 13.139,
    "s": 70.256,
    "l": 38.235
  },
  "oklch": {
    "l": 0.5,
    "c": 0.1474,
    "h": 36
  },
  "luminance": 0.11324
}

Semantic roles & 50–950 ramp

primary

#A63B1D

secondary

#59AEC6

accent

#C6ED3B

background

#FDF7F5

surface

#FAEDE9

border

#D3C8C5

text

#150904

muted

#837B79

Preview Lab

Preview with #A63B1D

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

Preview Lab → · Contrast checker → · Palette generator →