#A63A23#A63A23

#A63A23 is a mid, vivid red. Relative luminance 0.113; OKLCH L 49.9% C 0.147 H 33.7°. Best body text is #FFFFFF at 6.46:1 contrast (WCAG AA passes).

Color values

HEX	#A63A23
RGB	rgb(166, 58, 35)
HSL	hsl(11, 65%, 39%)
HSV	hsv(11, 79%, 65%)
CMYK	cmyk(0%, 65.1%, 78.9%, 34.9%)
CIE-LAB	lab(40.01, 43.27, 37.26)
CIE-LCH	lch(40.01, 57.10, 40.74°)
OKLab	oklab(49.93% 0.1224 0.0816)
OKLCH	oklch(49.93% 0.147 33.7)
XYZ	xyz(17.5443, 11.2570, 2.8388)
Luminance	0.1125 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#A63A23 #238FA6

analogous

#A6234E #A63A23 #A67B23

triadic

#A63A23 #23A63A #3A23A6

tetradic

#A63A23 #4EA623 #238FA6 #7B23A6

square

#A63A23 #4EA623 #238FA6 #7B23A6

split-complementary

#A63A23 #23A67B #234EA6

monochromatic

#41170E #732818 #A63A23 #D44F32 #DF7A65

Accessibility & contrast

On white

6.46

#A63A23 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.25

#A63A23 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #A63A23

6.46:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##A63A23	#FFFFFF	#000000	##FFFFFF
##A63A23	1.00	6.46	3.25	6.46
#FFFFFF	6.46	1.00	21.00	1.00
#000000	3.25	21.00	1.00	21.00
##FFFFFF	6.46	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#594F20

Deuteranopia (green-blind)

#73671F

Tritanopia (blue-blind)

#B71D35

Achromatopsia (no color)

#5E5E5E

Design tokens & code

CSS

--color: #a63a23;
/* rgb */ color: rgb(166, 58, 35);
/* oklch */ color: oklch(49.9% 0.147 33.7);

Tailwind

colors: {
  custom: {
    50: '#c8755f',
    500: '#a63a23',
    950: '#000000',
  },
}

SCSS

$custom: #a63a23;
$custom-light: #c8755f;
$custom-dark: #000000;

JSON

{
  "hex": "#a63a23",
  "rgb": {
    "r": 166,
    "g": 58,
    "b": 35
  },
  "hsl": {
    "h": 10.534,
    "s": 65.174,
    "l": 39.412
  },
  "oklch": {
    "l": 0.49931,
    "c": 0.14705,
    "h": 33.7
  },
  "luminance": 0.11254
}

Semantic roles & 50–950 ramp

primary

#A63A23

secondary

#61B3C4

accent

#CBE840

background

#FDF7F5

surface

#FAEDE9

border

#D3C8C5

text

#150905

muted

#837B79

Preview Lab

Preview with #A63A23

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

Preview Lab → · Contrast checker → · Palette generator →