#A63B27#A63B27

#A63B27 is a mid, vivid red. Relative luminance 0.114; OKLCH L 50.1% C 0.145 H 32.7°. Best body text is #FFFFFF at 6.41:1 contrast (WCAG AA passes).

Color values

HEX	#A63B27
RGB	rgb(166, 59, 39)
HSL	hsl(9, 62%, 40%)
HSV	hsv(9, 77%, 65%)
CMYK	cmyk(0%, 64.5%, 76.5%, 34.9%)
CIE-LAB	lab(40.22, 42.98, 35.30)
CIE-LCH	lch(40.22, 55.61, 39.40°)
OKLab	oklab(50.1% 0.1222 0.0784)
OKLCH	oklch(50.1% 0.145 32.7)
XYZ	xyz(17.6580, 11.3839, 3.1866)
Luminance	0.1138 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#A63B27 #2792A6

analogous

#A62752 #A63B27 #A67B27

triadic

#A63B27 #27A63B #3B27A6

tetradic

#A63B27 #52A627 #2792A6 #7B27A6

square

#A63B27 #52A627 #2792A6 #7B27A6

split-complementary

#A63B27 #27A67B #2752A6

monochromatic

#431810 #74291B #A63B27 #D1513A #DC7D6B

Accessibility & contrast

On white

6.41

#A63B27 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.28

#A63B27 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #A63B27

6.41:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##A63B27	#FFFFFF	#000000	##FFFFFF
##A63B27	1.00	6.41	3.28	6.41
#FFFFFF	6.41	1.00	21.00	1.00
#000000	3.28	21.00	1.00	21.00
##FFFFFF	6.41	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#595024

Deuteranopia (green-blind)

#746823

Tritanopia (blue-blind)

#B71F37

Achromatopsia (no color)

#5F5F5F

Design tokens & code

CSS

--color: #a63b27;
/* rgb */ color: rgb(166, 59, 39);
/* oklch */ color: oklch(50.1% 0.145 32.7);

Tailwind

colors: {
  custom: {
    50: '#c87662',
    500: '#a63b27',
    950: '#000000',
  },
}

SCSS

$custom: #a63b27;
$custom-light: #c87662;
$custom-dark: #000000;

JSON

{
  "hex": "#a63b27",
  "rgb": {
    "r": 166,
    "g": 59,
    "b": 39
  },
  "hsl": {
    "h": 9.449,
    "s": 61.951,
    "l": 40.196
  },
  "oklch": {
    "l": 0.50102,
    "c": 0.14522,
    "h": 32.7
  },
  "luminance": 0.11381
}

Semantic roles & 50–950 ramp

primary

#A63B27

secondary

#66B4C3

accent

#CBE543

background

#FDF7F5

surface

#FAEDEA

border

#D3C8C6

text

#150905

muted

#837B79

Preview Lab

Preview with #A63B27

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

Preview Lab → · Contrast checker → · Palette generator →