#A63B1B#A63B1B

#A63B1B is a mid, vivid red. Relative luminance 0.113; OKLCH L 50.0% C 0.148 H 36.6°. Best body text is #FFFFFF at 6.44:1 contrast (WCAG AA passes).

Color values

HEX	#A63B1B
RGB	rgb(166, 59, 27)
HSL	hsl(14, 72%, 38%)
HSV	hsv(14, 84%, 65%)
CMYK	cmyk(0%, 64.5%, 83.7%, 34.9%)
CIE-LAB	lab(40.11, 42.54, 41.45)
CIE-LCH	lch(40.11, 59.40, 44.25°)
OKLab	oklab(49.98% 0.1187 0.0881)
OKLCH	oklch(49.98% 0.148 36.6)
XYZ	xyz(17.4897, 11.3166, 2.3001)
Luminance	0.1131 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#A63B1B #1B86A6

analogous

#A61B40 #A63B1B #A6801B

triadic

#A63B1B #1BA63B #3B1BA6

tetradic

#A63B1B #40A61B #1B86A6 #801BA6

square

#A63B1B #40A61B #1B86A6 #801BA6

split-complementary

#A63B1B #1BA680 #1B40A6

monochromatic

#3D160A #712812 #A63B1B #DB4E24 #E47858

Accessibility & contrast

On white

6.44

#A63B1B on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.26

#A63B1B on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #A63B1B

6.44:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##A63B1B	#FFFFFF	#000000	##FFFFFF
##A63B1B	1.00	6.44	3.26	6.44
#FFFFFF	6.44	1.00	21.00	1.00
#000000	3.26	21.00	1.00	21.00
##FFFFFF	6.44	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5A4F16

Deuteranopia (green-blind)

#746716

Tritanopia (blue-blind)

#B71D35

Achromatopsia (no color)

#5E5E5E

Design tokens & code

CSS

--color: #a63b1b;
/* rgb */ color: rgb(166, 59, 27);
/* oklch */ color: oklch(50.0% 0.148 36.6);

Tailwind

colors: {
  custom: {
    50: '#c9765a',
    500: '#a63b1b',
    950: '#000000',
  },
}

SCSS

$custom: #a63b1b;
$custom-light: #c9765a;
$custom-dark: #000000;

JSON

{
  "hex": "#a63b1b",
  "rgb": {
    "r": 166,
    "g": 59,
    "b": 27
  },
  "hsl": {
    "h": 13.813,
    "s": 72.021,
    "l": 37.843
  },
  "oklch": {
    "l": 0.49983,
    "c": 0.14782,
    "h": 36.6
  },
  "luminance": 0.11314
}

Semantic roles & 50–950 ramp

primary

#A63B1B

secondary

#56ADC7

accent

#C5EF39

background

#FDF7F5

surface

#FAEDE9

border

#D3C8C5

text

#150904

muted

#837B79

Preview Lab

Preview with #A63B1B

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

Preview Lab → · Contrast checker → · Palette generator →