#A63B1F#A63B1F

#A63B1F is a mid, vivid red. Relative luminance 0.113; OKLCH L 50.0% C 0.147 H 35.4°. Best body text is #FFFFFF at 6.43:1 contrast (WCAG AA passes).

Color values

HEX	#A63B1F
RGB	rgb(166, 59, 31)
HSL	hsl(12, 69%, 39%)
HSV	hsv(12, 81%, 65%)
CMYK	cmyk(0%, 64.5%, 81.3%, 34.9%)
CIE-LAB	lab(40.14, 42.67, 39.49)
CIE-LCH	lch(40.14, 58.14, 42.79°)
OKLab	oklab(50.02% 0.1198 0.0852)
OKLCH	oklch(50.02% 0.147 35.4)
XYZ	xyz(17.5391, 11.3364, 2.5607)
Luminance	0.1133 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#A63B1F #1F8AA6

analogous

#A61F47 #A63B1F #A67E1F

triadic

#A63B1F #1FA63B #3B1FA6

tetradic

#A63B1F #47A61F #1F8AA6 #7E1FA6

square

#A63B1F #47A61F #1F8AA6 #7E1FA6

split-complementary

#A63B1F #1FA67E #1F47A6

monochromatic

#3F160C #722915 #A63B1F #D74F2B #E1795E

Accessibility & contrast

On white

6.43

#A63B1F on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.27

#A63B1F on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #A63B1F

6.43:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##A63B1F	#FFFFFF	#000000	##FFFFFF
##A63B1F	1.00	6.43	3.27	6.43
#FFFFFF	6.43	1.00	21.00	1.00
#000000	3.27	21.00	1.00	21.00
##FFFFFF	6.43	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5A501B

Deuteranopia (green-blind)

#74671B

Tritanopia (blue-blind)

#B71E35

Achromatopsia (no color)

#5F5F5F

Design tokens & code

CSS

--color: #a63b1f;
/* rgb */ color: rgb(166, 59, 31);
/* oklch */ color: oklch(50.0% 0.147 35.4);

Tailwind

colors: {
  custom: {
    50: '#c9765d',
    500: '#a63b1f',
    950: '#000000',
  },
}

SCSS

$custom: #a63b1f;
$custom-light: #c9765d;
$custom-dark: #000000;

JSON

{
  "hex": "#a63b1f",
  "rgb": {
    "r": 166,
    "g": 59,
    "b": 31
  },
  "hsl": {
    "h": 12.444,
    "s": 68.528,
    "l": 38.627
  },
  "oklch": {
    "l": 0.50018,
    "c": 0.14698,
    "h": 35.4
  },
  "luminance": 0.11334
}

Semantic roles & 50–950 ramp

primary

#A63B1F

secondary

#5BAFC5

accent

#C7EB3C

background

#FDF7F5

surface

#FAEDE9

border

#D3C8C5

text

#150904

muted

#837B79

Preview Lab

Preview with #A63B1F

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

Preview Lab → · Contrast checker → · Palette generator →