#A63F33#A63F33

#A63F33 is a mid, vivid red. Relative luminance 0.119; OKLCH L 50.8% C 0.139 H 29.4°. Best body text is #FFFFFF at 6.21:1 contrast (WCAG AA passes).

Color values

HEX	#A63F33
RGB	rgb(166, 63, 51)
HSL	hsl(6, 53%, 43%)
HSV	hsv(6, 69%, 65%)
CMYK	cmyk(0%, 62%, 69.3%, 34.9%)
CIE-LAB	lab(41.06, 41.72, 29.36)
CIE-LCH	lch(41.06, 51.01, 35.14°)
OKLab	oklab(50.78% 0.1207 0.068)
OKLCH	oklch(50.78% 0.139 29.4)
XYZ	xyz(18.1028, 11.9035, 4.4757)
Luminance	0.1190 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#A63F33 #339AA6

analogous

#A63360 #A63F33 #A67933

triadic

#A63F33 #33A63F #3F33A6

tetradic

#A63F33 #60A633 #339AA6 #7933A6

square

#A63F33 #60A633 #339AA6 #7933A6

split-complementary

#A63F33 #33A679 #3360A6

monochromatic

#481B16 #772D25 #A63F33 #C95A4E #D7867C

Accessibility & contrast

On white

6.21

#A63F33 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.38

#A63F33 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #A63F33

6.21:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##A63F33	#FFFFFF	#000000	##FFFFFF
##A63F33	1.00	6.21	3.38	6.21
#FFFFFF	6.21	1.00	21.00	1.00
#000000	3.38	21.00	1.00	21.00
##FFFFFF	6.21	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5B5331

Deuteranopia (green-blind)

#746930

Tritanopia (blue-blind)

#B6283D

Achromatopsia (no color)

#616161

Design tokens & code

CSS

--color: #a63f33;
/* rgb */ color: rgb(166, 63, 51);
/* oklch */ color: oklch(50.8% 0.139 29.4);

Tailwind

colors: {
  custom: {
    50: '#c7786b',
    500: '#a63f33',
    950: '#000000',
  },
}

SCSS

$custom: #a63f33;
$custom-light: #c7786b;
$custom-dark: #000000;

JSON

{
  "hex": "#a63f33",
  "rgb": {
    "r": 166,
    "g": 63,
    "b": 51
  },
  "hsl": {
    "h": 6.261,
    "s": 52.995,
    "l": 42.549
  },
  "oklch": {
    "l": 0.50784,
    "c": 0.13857,
    "h": 29.4
  },
  "luminance": 0.11901
}

Semantic roles & 50–950 ramp

primary

#A63F33

secondary

#75B8C0

accent

#CDDC4B

background

#FDF7F6

surface

#FAEEEB

border

#D3C9C6

text

#140906

muted

#837B7A

Preview Lab

Preview with #A63F33

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

Preview Lab → · Contrast checker → · Palette generator →