#A63A1B#A63A1B

#A63A1B is a mid, vivid red. Relative luminance 0.112; OKLCH L 49.9% C 0.149 H 36.2°. Best body text is #FFFFFF at 6.48:1 contrast (WCAG AA passes).

Color values

HEX	#A63A1B
RGB	rgb(166, 58, 27)
HSL	hsl(13, 72%, 38%)
HSV	hsv(13, 84%, 65%)
CMYK	cmyk(0%, 65.1%, 83.7%, 34.9%)
CIE-LAB	lab(39.94, 43.00, 41.30)
CIE-LCH	lch(39.94, 59.62, 43.85°)
OKLab	oklab(49.86% 0.1201 0.0878)
OKLCH	oklch(49.86% 0.149 36.2)
XYZ	xyz(17.4388, 11.2148, 2.2831)
Luminance	0.1121 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#A63A1B #1B87A6

analogous

#A61B42 #A63A1B #A67F1B

triadic

#A63A1B #1BA63A #3A1BA6

tetradic

#A63A1B #42A61B #1B87A6 #7F1BA6

square

#A63A1B #42A61B #1B87A6 #7F1BA6

split-complementary

#A63A1B #1BA67F #1B42A6

monochromatic

#3D150A #712812 #A63A1B #DB4C24 #E47758

Accessibility & contrast

On white

6.48

#A63A1B on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.24

#A63A1B on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #A63A1B

6.48:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##A63A1B	#FFFFFF	#000000	##FFFFFF
##A63A1B	1.00	6.48	3.24	6.48
#FFFFFF	6.48	1.00	21.00	1.00
#000000	3.24	21.00	1.00	21.00
##FFFFFF	6.48	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#594F16

Deuteranopia (green-blind)

#746716

Tritanopia (blue-blind)

#B71B34

Achromatopsia (no color)

#5E5E5E

Design tokens & code

CSS

--color: #a63a1b;
/* rgb */ color: rgb(166, 58, 27);
/* oklch */ color: oklch(49.9% 0.149 36.2);

Tailwind

colors: {
  custom: {
    50: '#c9755a',
    500: '#a63a1b',
    950: '#000000',
  },
}

SCSS

$custom: #a63a1b;
$custom-light: #c9755a;
$custom-dark: #000000;

JSON

{
  "hex": "#a63a1b",
  "rgb": {
    "r": 166,
    "g": 58,
    "b": 27
  },
  "hsl": {
    "h": 13.381,
    "s": 72.021,
    "l": 37.843
  },
  "oklch": {
    "l": 0.49856,
    "c": 0.14874,
    "h": 36.2
  },
  "luminance": 0.11212
}

Semantic roles & 50–950 ramp

primary

#A63A1B

secondary

#56AEC7

accent

#C6EF39

background

#FDF7F5

surface

#FAEDE9

border

#D3C8C5

text

#150904

muted

#837B79

Preview Lab

Preview with #A63A1B

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

Preview Lab → · Contrast checker → · Palette generator →