#A63A21#A63A21

#A63A21 is a mid, vivid red. Relative luminance 0.112; OKLCH L 49.9% C 0.147 H 34.4°. Best body text is #FFFFFF at 6.46:1 contrast (WCAG AA passes).

Color values

HEX	#A63A21
RGB	rgb(166, 58, 33)
HSL	hsl(11, 67%, 39%)
HSV	hsv(11, 80%, 65%)
CMYK	cmyk(0%, 65.1%, 80.1%, 34.9%)
CIE-LAB	lab(39.99, 43.19, 38.31)
CIE-LCH	lch(39.99, 57.73, 41.57°)
OKLab	oklab(49.91% 0.1217 0.0833)
OKLCH	oklch(49.91% 0.147 34.4)
XYZ	xyz(17.5154, 11.2454, 2.6868)
Luminance	0.1124 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#A63A21 #218DA6

analogous

#A6214B #A63A21 #A67D21

triadic

#A63A21 #21A63A #3A21A6

tetradic

#A63A21 #4BA621 #218DA6 #7D21A6

square

#A63A21 #4BA621 #218DA6 #7D21A6

split-complementary

#A63A21 #21A67D #214BA6

monochromatic

#40160D #732817 #A63A21 #D64E2F #E07962

Accessibility & contrast

On white

6.46

#A63A21 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.25

#A63A21 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #A63A21

6.46:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##A63A21	#FFFFFF	#000000	##FFFFFF
##A63A21	1.00	6.46	3.25	6.46
#FFFFFF	6.46	1.00	21.00	1.00
#000000	3.25	21.00	1.00	21.00
##FFFFFF	6.46	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#594F1D

Deuteranopia (green-blind)

#73671D

Tritanopia (blue-blind)

#B71C35

Achromatopsia (no color)

#5E5E5E

Design tokens & code

CSS

--color: #a63a21;
/* rgb */ color: rgb(166, 58, 33);
/* oklch */ color: oklch(49.9% 0.147 34.4);

Tailwind

colors: {
  custom: {
    50: '#c8755e',
    500: '#a63a21',
    950: '#000000',
  },
}

SCSS

$custom: #a63a21;
$custom-light: #c8755e;
$custom-dark: #000000;

JSON

{
  "hex": "#a63a21",
  "rgb": {
    "r": 166,
    "g": 58,
    "b": 33
  },
  "hsl": {
    "h": 11.278,
    "s": 66.834,
    "l": 39.02
  },
  "oklch": {
    "l": 0.4991,
    "c": 0.14748,
    "h": 34.4
  },
  "luminance": 0.11243
}

Semantic roles & 50–950 ramp

primary

#A63A21

secondary

#5EB1C5

accent

#C9EA3E

background

#FDF7F5

surface

#FAEDE9

border

#D3C8C5

text

#150904

muted

#837B79

Preview Lab

Preview with #A63A21

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

Preview Lab → · Contrast checker → · Palette generator →