#A6371D#A6371D

#A6371D is a mid, vivid red. Relative luminance 0.109; OKLCH L 49.5% C 0.151 H 34.4°. Best body text is #FFFFFF at 6.59:1 contrast (WCAG AA passes).

Color values

HEX	#A6371D
RGB	rgb(166, 55, 29)
HSL	hsl(11, 70%, 38%)
HSV	hsv(11, 83%, 65%)
CMYK	cmyk(0%, 66.9%, 82.5%, 34.9%)
CIE-LAB	lab(39.46, 44.38, 39.86)
CIE-LCH	lch(39.46, 59.65, 41.93°)
OKLab	oklab(49.5% 0.1247 0.0853)
OKLCH	oklch(49.5% 0.151 34.4)
XYZ	xyz(17.3158, 10.9306, 2.3602)
Luminance	0.1093 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#A6371D #1D8CA6

analogous

#A61D47 #A6371D #A67B1D

triadic

#A6371D #1DA637 #371DA6

tetradic

#A6371D #47A61D #1D8CA6 #7B1DA6

square

#A6371D #47A61D #1D8CA6 #7B1DA6

split-complementary

#A6371D #1DA67B #1D47A6

monochromatic

#3E140B #722614 #A6371D #D94927 #E2755B

Accessibility & contrast

On white

6.59

#A6371D on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.19

#A6371D on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #A6371D

6.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##A6371D	#FFFFFF	#000000	##FFFFFF
##A6371D	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)

#574D19

Deuteranopia (green-blind)

#736618

Tritanopia (blue-blind)

#B71532

Achromatopsia (no color)

#5D5D5D

Design tokens & code

CSS

--color: #a6371d;
/* rgb */ color: rgb(166, 55, 29);
/* oklch */ color: oklch(49.5% 0.151 34.4);

Tailwind

colors: {
  custom: {
    50: '#c9745b',
    500: '#a6371d',
    950: '#000000',
  },
}

SCSS

$custom: #a6371d;
$custom-light: #c9745b;
$custom-dark: #000000;

JSON

{
  "hex": "#a6371d",
  "rgb": {
    "r": 166,
    "g": 55,
    "b": 29
  },
  "hsl": {
    "h": 11.387,
    "s": 70.256,
    "l": 38.235
  },
  "oklch": {
    "l": 0.49502,
    "c": 0.15109,
    "h": 34.4
  },
  "luminance": 0.10928
}

Semantic roles & 50–950 ramp

primary

#A6371D

secondary

#59B1C6

accent

#CBED3B

background

#FDF7F5

surface

#FAEDE9

border

#D3C8C5

text

#150804

muted

#837B79

Preview Lab

Preview with #A6371D

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

Preview Lab → · Contrast checker → · Palette generator →