#A63F21#A63F21

#A63F21 is a mid, vivid red. Relative luminance 0.118; OKLCH L 50.6% C 0.143 H 36.6°. Best body text is #FFFFFF at 6.26:1 contrast (WCAG AA passes).

Color values

HEX	#A63F21
RGB	rgb(166, 63, 33)
HSL	hsl(14, 67%, 39%)
HSV	hsv(14, 80%, 65%)
CMYK	cmyk(0%, 62%, 80.1%, 34.9%)
CIE-LAB	lab(40.86, 40.89, 39.17)
CIE-LCH	lch(40.86, 56.62, 43.77°)
OKLab	oklab(50.56% 0.1146 0.0851)
OKLCH	oklch(50.56% 0.143 36.6)
XYZ	xyz(17.7798, 11.7743, 2.7750)
Luminance	0.1177 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#A63F21 #2188A6

analogous

#A62146 #A63F21 #A68221

triadic

#A63F21 #21A63F #3F21A6

tetradic

#A63F21 #46A621 #2188A6 #8221A6

square

#A63F21 #46A621 #2188A6 #8221A6

split-complementary

#A63F21 #21A682 #2146A6

monochromatic

#40180D #732C17 #A63F21 #D6542F #E07E62

Accessibility & contrast

On white

6.26

#A63F21 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.35

#A63F21 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #A63F21

6.26:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##A63F21	#FFFFFF	#000000	##FFFFFF
##A63F21	1.00	6.26	3.35	6.26
#FFFFFF	6.26	1.00	21.00	1.00
#000000	3.35	21.00	1.00	21.00
##FFFFFF	6.26	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5C521D

Deuteranopia (green-blind)

#75691D

Tritanopia (blue-blind)

#B72539

Achromatopsia (no color)

#606060

Design tokens & code

CSS

--color: #a63f21;
/* rgb */ color: rgb(166, 63, 33);
/* oklch */ color: oklch(50.6% 0.143 36.6);

Tailwind

colors: {
  custom: {
    50: '#c8785e',
    500: '#a63f21',
    950: '#000000',
  },
}

SCSS

$custom: #a63f21;
$custom-light: #c8785e;
$custom-dark: #000000;

JSON

{
  "hex": "#a63f21",
  "rgb": {
    "r": 166,
    "g": 63,
    "b": 33
  },
  "hsl": {
    "h": 13.534,
    "s": 66.834,
    "l": 39.02
  },
  "oklch": {
    "l": 0.50562,
    "c": 0.14279,
    "h": 36.6
  },
  "luminance": 0.11772
}

Semantic roles & 50–950 ramp

primary

#A63F21

secondary

#5EAEC5

accent

#C3EA3E

background

#FDF7F5

surface

#FAEDE9

border

#D3C8C5

text

#150904

muted

#837B79

Preview Lab

Preview with #A63F21

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

Preview Lab → · Contrast checker → · Palette generator →