#A63539#A63539

#A63539 is a mid, vivid red. Relative luminance 0.109; OKLCH L 49.6% C 0.148 H 22.4°. Best body text is #FFFFFF at 6.58:1 contrast (WCAG AA passes).

Color values

HEX	#A63539
RGB	rgb(166, 53, 57)
HSL	hsl(358, 52%, 43%)
HSV	hsv(358, 68%, 65%)
CMYK	cmyk(0%, 68.1%, 65.7%, 34.9%)
CIE-LAB	lab(39.50, 46.52, 23.83)
CIE-LCH	lch(39.50, 52.27, 27.12°)
OKLab	oklab(49.64% 0.1371 0.0566)
OKLCH	oklch(49.64% 0.148 22.4)
XYZ	xyz(17.7393, 10.9511, 5.0498)
Luminance	0.1095 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#A63539 #35A6A2

analogous

#A63571 #A63539 #A66935

triadic

#A63539 #39A635 #3539A6

tetradic

#A63539 #71A635 #35A6A2 #6935A6

square

#A63539 #71A635 #35A6A2 #6935A6

split-complementary

#A63539 #35A669 #3571A6

monochromatic

#491719 #782629 #A63539 #C75155 #D67F82

Accessibility & contrast

On white

6.58

#A63539 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.19

#A63539 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #A63539

6.58:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##A63539	#FFFFFF	#000000	##FFFFFF
##A63539	1.00	6.58	3.19	6.58
#FFFFFF	6.58	1.00	21.00	1.00
#000000	3.19	21.00	1.00	21.00
##FFFFFF	6.58	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#534E38

Deuteranopia (green-blind)

#706636

Tritanopia (blue-blind)

#B61837

Achromatopsia (no color)

#5D5D5D

Design tokens & code

CSS

--color: #a63539;
/* rgb */ color: rgb(166, 53, 57);
/* oklch */ color: oklch(49.6% 0.148 22.4);

Tailwind

colors: {
  custom: {
    50: '#c7736f',
    500: '#a63539',
    950: '#000000',
  },
}

SCSS

$custom: #a63539;
$custom-light: #c7736f;
$custom-dark: #000000;

JSON

{
  "hex": "#a63539",
  "rgb": {
    "r": 166,
    "g": 53,
    "b": 57
  },
  "hsl": {
    "h": 357.876,
    "s": 51.598,
    "l": 42.941
  },
  "oklch": {
    "l": 0.4964,
    "c": 0.14829,
    "h": 22.4
  },
  "luminance": 0.10949
}

Semantic roles & 50–950 ramp

primary

#A63539

secondary

#77BFBD

accent

#DBD64D

background

#FDF7F6

surface

#FAEDEC

border

#D3C8C7

text

#140807

muted

#837B7A

Preview Lab

Preview with #A63539

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

Preview Lab → · Contrast checker → · Palette generator →