#A63537#A63537

#A63537 is a mid, vivid red. Relative luminance 0.109; OKLCH L 49.6% C 0.149 H 23.4°. Best body text is #FFFFFF at 6.59:1 contrast (WCAG AA passes).

Color values

HEX	#A63537
RGB	rgb(166, 53, 55)
HSL	hsl(359, 52%, 43%)
HSV	hsv(359, 68%, 65%)
CMYK	cmyk(0%, 68.1%, 66.9%, 34.9%)
CIE-LAB	lab(39.46, 46.40, 25.02)
CIE-LCH	lch(39.46, 52.72, 28.33°)
OKLab	oklab(49.6% 0.1363 0.059)
OKLCH	oklch(49.6% 0.149 23.4)
XYZ	xyz(17.6904, 10.9315, 4.7922)
Luminance	0.1093 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#A63537 #35A6A4

analogous

#A6356F #A63537 #A66B35

triadic

#A63537 #37A635 #3537A6

tetradic

#A63537 #6FA635 #35A6A4 #6B35A6

square

#A63537 #6FA635 #35A6A4 #6B35A6

split-complementary

#A63537 #35A66B #356FA6

monochromatic

#491718 #782628 #A63537 #C75153 #D67F81

Accessibility & contrast

On white

6.59

#A63537 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.19

#A63537 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #A63537

6.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##A63537	#FFFFFF	#000000	##FFFFFF
##A63537	1.00	6.59	3.19	6.59
#FFFFFF	6.59	1.00	21.00	1.00
#000000	3.19	21.00	1.00	21.00
##FFFFFF	6.59	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#544E36

Deuteranopia (green-blind)

#706634

Tritanopia (blue-blind)

#B61837

Achromatopsia (no color)

#5D5D5D

Design tokens & code

CSS

--color: #a63537;
/* rgb */ color: rgb(166, 53, 55);
/* oklch */ color: oklch(49.6% 0.149 23.4);

Tailwind

colors: {
  custom: {
    50: '#c7736e',
    500: '#a63537',
    950: '#000000',
  },
}

SCSS

$custom: #a63537;
$custom-light: #c7736e;
$custom-dark: #000000;

JSON

{
  "hex": "#a63537",
  "rgb": {
    "r": 166,
    "g": 53,
    "b": 55
  },
  "hsl": {
    "h": 358.938,
    "s": 51.598,
    "l": 42.941
  },
  "oklch": {
    "l": 0.49604,
    "c": 0.14851,
    "h": 23.4
  },
  "luminance": 0.10929
}

Semantic roles & 50–950 ramp

primary

#A63537

secondary

#77BFBE

accent

#DBD94D

background

#FDF7F6

surface

#FAEDEB

border

#D3C8C6

text

#140807

muted

#837B7A

Preview Lab

Preview with #A63537

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

Preview Lab → · Contrast checker → · Palette generator →