#A63B21#A63B21

#A63B21 is a mid, vivid red. Relative luminance 0.113; OKLCH L 50.0% C 0.147 H 34.8°. Best body text is #FFFFFF at 6.42:1 contrast (WCAG AA passes).

Color values

HEX	#A63B21
RGB	rgb(166, 59, 33)
HSL	hsl(12, 67%, 39%)
HSV	hsv(12, 80%, 65%)
CMYK	cmyk(0%, 64.5%, 80.1%, 34.9%)
CIE-LAB	lab(40.16, 42.74, 38.48)
CIE-LCH	lch(40.16, 57.51, 41.99°)
OKLab	oklab(50.04% 0.1204 0.0836)
OKLCH	oklch(50.04% 0.147 34.8)
XYZ	xyz(17.5663, 11.3473, 2.7038)
Luminance	0.1134 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#A63B21 #218CA6

analogous

#A6214A #A63B21 #A67E21

triadic

#A63B21 #21A63B #3B21A6

tetradic

#A63B21 #4AA621 #218CA6 #7E21A6

square

#A63B21 #4AA621 #218CA6 #7E21A6

split-complementary

#A63B21 #21A67E #214AA6

monochromatic

#40170D #732917 #A63B21 #D64F2F #E07A62

Accessibility & contrast

On white

6.42

#A63B21 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.27

#A63B21 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #A63B21

6.42:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##A63B21	#FFFFFF	#000000	##FFFFFF
##A63B21	1.00	6.42	3.27	6.42
#FFFFFF	6.42	1.00	21.00	1.00
#000000	3.27	21.00	1.00	21.00
##FFFFFF	6.42	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#59501D

Deuteranopia (green-blind)

#74671D

Tritanopia (blue-blind)

#B71E36

Achromatopsia (no color)

#5F5F5F

Design tokens & code

CSS

--color: #a63b21;
/* rgb */ color: rgb(166, 59, 33);
/* oklch */ color: oklch(50.0% 0.147 34.8);

Tailwind

colors: {
  custom: {
    50: '#c8765e',
    500: '#a63b21',
    950: '#000000',
  },
}

SCSS

$custom: #a63b21;
$custom-light: #c8765e;
$custom-dark: #000000;

JSON

{
  "hex": "#a63b21",
  "rgb": {
    "r": 166,
    "g": 59,
    "b": 33
  },
  "hsl": {
    "h": 11.729,
    "s": 66.834,
    "l": 39.02
  },
  "oklch": {
    "l": 0.50037,
    "c": 0.14654,
    "h": 34.8
  },
  "luminance": 0.11345
}

Semantic roles & 50–950 ramp

primary

#A63B21

secondary

#5EB1C5

accent

#C8EA3E

background

#FDF7F5

surface

#FAEDE9

border

#D3C8C5

text

#150904

muted

#837B79

Preview Lab

Preview with #A63B21

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

Preview Lab → · Contrast checker → · Palette generator →