#A63037#A63037

#A63037 is a mid, vivid red. Relative luminance 0.105; OKLCH L 49.1% C 0.154 H 21.7°. Best body text is #FFFFFF at 6.78:1 contrast (WCAG AA passes).

Color values

HEX	#A63037
RGB	rgb(166, 48, 55)
HSL	hsl(356, 55%, 42%)
HSV	hsv(356, 71%, 65%)
CMYK	cmyk(0%, 71.1%, 66.9%, 34.9%)
CIE-LAB	lab(38.72, 48.43, 24.09)
CIE-LCH	lch(38.72, 54.09, 26.45°)
OKLab	oklab(49.05% 0.1427 0.0569)
OKLCH	oklch(49.05% 0.154 21.7)
XYZ	xyz(17.4743, 10.4993, 4.7201)
Luminance	0.1050 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#A63037 #30A69F

analogous

#A63072 #A63037 #A66430

triadic

#A63037 #37A630 #3037A6

tetradic

#A63037 #72A630 #30A69F #6430A6

square

#A63037 #72A630 #30A69F #6430A6

split-complementary

#A63037 #30A664 #3072A6

monochromatic

#471518 #772227 #A63037 #CA4951 #D8787E

Accessibility & contrast

On white

6.78

#A63037 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.10

#A63037 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #A63037

6.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##A63037	#FFFFFF	#000000	##FFFFFF
##A63037	1.00	6.78	3.10	6.78
#FFFFFF	6.78	1.00	21.00	1.00
#000000	3.10	21.00	1.00	21.00
##FFFFFF	6.78	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#514B36

Deuteranopia (green-blind)

#6E6434

Tritanopia (blue-blind)

#B60B34

Achromatopsia (no color)

#5B5B5B

Design tokens & code

CSS

--color: #a63037;
/* rgb */ color: rgb(166, 48, 55);
/* oklch */ color: oklch(49.1% 0.154 21.7);

Tailwind

colors: {
  custom: {
    50: '#c8716d',
    500: '#a63037',
    950: '#000000',
  },
}

SCSS

$custom: #a63037;
$custom-light: #c8716d;
$custom-dark: #000000;

JSON

{
  "hex": "#a63037",
  "rgb": {
    "r": 166,
    "g": 48,
    "b": 55
  },
  "hsl": {
    "h": 356.441,
    "s": 55.14,
    "l": 41.961
  },
  "oklch": {
    "l": 0.49051,
    "c": 0.15365,
    "h": 21.7
  },
  "luminance": 0.10497
}

Semantic roles & 50–950 ramp

primary

#A63037

secondary

#71C0BC

accent

#DED649

background

#FDF7F6

surface

#FAEDEB

border

#D3C8C6

text

#140807

muted

#837B7A

Preview Lab

Preview with #A63037

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

Preview Lab → · Contrast checker → · Palette generator →