#A63733#A63733

#A63733 is a mid, vivid red. Relative luminance 0.111; OKLCH L 49.8% C 0.147 H 26.0°. Best body text is #FFFFFF at 6.53:1 contrast (WCAG AA passes).

Color values

HEX	#A63733
RGB	rgb(166, 55, 51)
HSL	hsl(2, 53%, 43%)
HSV	hsv(2, 69%, 65%)
CMYK	cmyk(0%, 66.9%, 69.3%, 34.9%)
CIE-LAB	lab(39.72, 45.33, 27.75)
CIE-LCH	lch(39.72, 53.15, 31.48°)
OKLab	oklab(49.77% 0.1321 0.0644)
OKLCH	oklch(49.77% 0.147 26)
XYZ	xyz(17.6915, 11.0809, 4.3386)
Luminance	0.1108 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#A63733 #33A2A6

analogous

#A63368 #A63733 #A67133

triadic

#A63733 #33A637 #3733A6

tetradic

#A63733 #68A633 #33A2A6 #7133A6

square

#A63733 #68A633 #33A2A6 #7133A6

split-complementary

#A63733 #33A671 #3368A6

monochromatic

#481816 #772725 #A63733 #C9524E #D7807C

Accessibility & contrast

On white

6.53

#A63733 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.22

#A63733 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #A63733

6.53:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##A63733	#FFFFFF	#000000	##FFFFFF
##A63733	1.00	6.53	3.22	6.53
#FFFFFF	6.53	1.00	21.00	1.00
#000000	3.22	21.00	1.00	21.00
##FFFFFF	6.53	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#554E32

Deuteranopia (green-blind)

#716630

Tritanopia (blue-blind)

#B61A37

Achromatopsia (no color)

#5E5E5E

Design tokens & code

CSS

--color: #a63733;
/* rgb */ color: rgb(166, 55, 51);
/* oklch */ color: oklch(49.8% 0.147 26.0);

Tailwind

colors: {
  custom: {
    50: '#c7746b',
    500: '#a63733',
    950: '#000000',
  },
}

SCSS

$custom: #a63733;
$custom-light: #c7746b;
$custom-dark: #000000;

JSON

{
  "hex": "#a63733",
  "rgb": {
    "r": 166,
    "g": 55,
    "b": 51
  },
  "hsl": {
    "h": 2.087,
    "s": 52.995,
    "l": 42.549
  },
  "oklch": {
    "l": 0.49773,
    "c": 0.14695,
    "h": 26
  },
  "luminance": 0.11078
}

Semantic roles & 50–950 ramp

primary

#A63733

secondary

#75BDC0

accent

#D7DC4B

background

#FDF7F6

surface

#FAEDEB

border

#D3C8C6

text

#140906

muted

#837B7A

Preview Lab

Preview with #A63733

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

Preview Lab → · Contrast checker → · Palette generator →