#A63B23#A63B23

#A63B23 is a mid, vivid red. Relative luminance 0.114; OKLCH L 50.1% C 0.146 H 34.1°. Best body text is #FFFFFF at 6.42:1 contrast (WCAG AA passes).

Color values

HEX	#A63B23
RGB	rgb(166, 59, 35)
HSL	hsl(11, 65%, 39%)
HSV	hsv(11, 79%, 65%)
CMYK	cmyk(0%, 64.5%, 78.9%, 34.9%)
CIE-LAB	lab(40.18, 42.82, 37.44)
CIE-LCH	lch(40.18, 56.87, 41.17°)
OKLab	oklab(50.06% 0.121 0.082)
OKLCH	oklch(50.06% 0.146 34.1)
XYZ	xyz(17.5952, 11.3588, 2.8558)
Luminance	0.1136 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#A63B23 #238EA6

analogous

#A6234D #A63B23 #A67C23

triadic

#A63B23 #23A63B #3B23A6

tetradic

#A63B23 #4DA623 #238EA6 #7C23A6

square

#A63B23 #4DA623 #238EA6 #7C23A6

split-complementary

#A63B23 #23A67C #234DA6

monochromatic

#41170E #732918 #A63B23 #D45032 #DF7B65

Accessibility & contrast

On white

6.42

#A63B23 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.27

#A63B23 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #A63B23

6.42:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##A63B23	#FFFFFF	#000000	##FFFFFF
##A63B23	1.00	6.42	3.27	6.42
#FFFFFF	6.42	1.00	21.00	1.00
#000000	3.27	21.00	1.00	21.00
##FFFFFF	6.42	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#595020

Deuteranopia (green-blind)

#74671F

Tritanopia (blue-blind)

#B71E36

Achromatopsia (no color)

#5F5F5F

Design tokens & code

CSS

--color: #a63b23;
/* rgb */ color: rgb(166, 59, 35);
/* oklch */ color: oklch(50.1% 0.146 34.1);

Tailwind

colors: {
  custom: {
    50: '#c87660',
    500: '#a63b23',
    950: '#000000',
  },
}

SCSS

$custom: #a63b23;
$custom-light: #c87660;
$custom-dark: #000000;

JSON

{
  "hex": "#a63b23",
  "rgb": {
    "r": 166,
    "g": 59,
    "b": 35
  },
  "hsl": {
    "h": 10.992,
    "s": 65.174,
    "l": 39.412
  },
  "oklch": {
    "l": 0.50057,
    "c": 0.1461,
    "h": 34.1
  },
  "luminance": 0.11356
}

Semantic roles & 50–950 ramp

primary

#A63B23

secondary

#61B2C4

accent

#C9E840

background

#FDF7F5

surface

#FAEDE9

border

#D3C8C5

text

#150905

muted

#837B79

Preview Lab

Preview with #A63B23

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

Preview Lab → · Contrast checker → · Palette generator →