#A63D21#A63D21

#A63D21 is a mid, vivid red. Relative luminance 0.116; OKLCH L 50.3% C 0.145 H 35.7°. Best body text is #FFFFFF at 6.34:1 contrast (WCAG AA passes).

Color values

HEX	#A63D21
RGB	rgb(166, 61, 33)
HSL	hsl(13, 67%, 39%)
HSV	hsv(13, 80%, 65%)
CMYK	cmyk(0%, 63.3%, 80.1%, 34.9%)
CIE-LAB	lab(40.50, 41.83, 38.82)
CIE-LCH	lch(40.50, 57.06, 42.87°)
OKLab	oklab(50.3% 0.1175 0.0844)
OKLCH	oklch(50.3% 0.145 35.7)
XYZ	xyz(17.6711, 11.5568, 2.7387)
Luminance	0.1155 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#A63D21 #218AA6

analogous

#A62147 #A63D21 #A68021

triadic

#A63D21 #21A63D #3D21A6

tetradic

#A63D21 #47A621 #218AA6 #8021A6

square

#A63D21 #47A621 #218AA6 #8021A6

split-complementary

#A63D21 #21A680 #2147A6

monochromatic

#40170D #732A17 #A63D21 #D6522F #E07C62

Accessibility & contrast

On white

6.34

#A63D21 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.31

#A63D21 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #A63D21

6.34:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##A63D21	#FFFFFF	#000000	##FFFFFF
##A63D21	1.00	6.34	3.31	6.34
#FFFFFF	6.34	1.00	21.00	1.00
#000000	3.31	21.00	1.00	21.00
##FFFFFF	6.34	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5B511D

Deuteranopia (green-blind)

#75681D

Tritanopia (blue-blind)

#B72237

Achromatopsia (no color)

#5F5F5F

Design tokens & code

CSS

--color: #a63d21;
/* rgb */ color: rgb(166, 61, 33);
/* oklch */ color: oklch(50.3% 0.145 35.7);

Tailwind

colors: {
  custom: {
    50: '#c8775e',
    500: '#a63d21',
    950: '#000000',
  },
}

SCSS

$custom: #a63d21;
$custom-light: #c8775e;
$custom-dark: #000000;

JSON

{
  "hex": "#a63d21",
  "rgb": {
    "r": 166,
    "g": 61,
    "b": 33
  },
  "hsl": {
    "h": 12.632,
    "s": 66.834,
    "l": 39.02
  },
  "oklch": {
    "l": 0.50296,
    "c": 0.14466,
    "h": 35.7
  },
  "luminance": 0.11554
}

Semantic roles & 50–950 ramp

primary

#A63D21

secondary

#5EAFC5

accent

#C6EA3E

background

#FDF7F5

surface

#FAEDE9

border

#D3C8C5

text

#150904

muted

#837B79

Preview Lab

Preview with #A63D21

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

Preview Lab → · Contrast checker → · Palette generator →