#A6311B#A6311B

#A6311B is a mid, vivid red. Relative luminance 0.104; OKLCH L 48.8% C 0.157 H 32.8°. Best body text is #FFFFFF at 6.83:1 contrast (WCAG AA passes).

Color values

HEX	#A6311B
RGB	rgb(166, 49, 27)
HSL	hsl(9, 72%, 38%)
HSV	hsv(9, 84%, 65%)
CMYK	cmyk(0%, 70.5%, 83.7%, 34.9%)
CIE-LAB	lab(38.53, 46.82, 39.99)
CIE-LCH	lch(38.53, 61.58, 40.50°)
OKLab	oklab(48.79% 0.1319 0.0849)
OKLCH	oklch(48.79% 0.157 32.8)
XYZ	xyz(17.0240, 10.3854, 2.1449)
Luminance	0.1038 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#A6311B #1B90A6

analogous

#A61B4B #A6311B #A6761B

triadic

#A6311B #1BA631 #311BA6

tetradic

#A6311B #4BA61B #1B90A6 #761BA6

square

#A6311B #4BA61B #1B90A6 #761BA6

split-complementary

#A6311B #1BA676 #1B4BA6

monochromatic

#3D120A #712112 #A6311B #DB4124 #E46E58

Accessibility & contrast

On white

6.83

#A6311B on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.08

#A6311B on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #A6311B

6.83:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##A6311B	#FFFFFF	#000000	##FFFFFF
##A6311B	1.00	6.83	3.08	6.83
#FFFFFF	6.83	1.00	21.00	1.00
#000000	3.08	21.00	1.00	21.00
##FFFFFF	6.83	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#544A17

Deuteranopia (green-blind)

#716415

Tritanopia (blue-blind)

#B7012D

Achromatopsia (no color)

#5B5B5B

Design tokens & code

CSS

--color: #a6311b;
/* rgb */ color: rgb(166, 49, 27);
/* oklch */ color: oklch(48.8% 0.157 32.8);

Tailwind

colors: {
  custom: {
    50: '#c9705a',
    500: '#a6311b',
    950: '#000000',
  },
}

SCSS

$custom: #a6311b;
$custom-light: #c9705a;
$custom-dark: #000000;

JSON

{
  "hex": "#a6311b",
  "rgb": {
    "r": 166,
    "g": 49,
    "b": 27
  },
  "hsl": {
    "h": 9.496,
    "s": 72.021,
    "l": 37.843
  },
  "oklch": {
    "l": 0.48793,
    "c": 0.15684,
    "h": 32.8
  },
  "luminance": 0.10383
}

Semantic roles & 50–950 ramp

primary

#A6311B

secondary

#56B5C7

accent

#D2EF39

background

#FDF7F5

surface

#FBEDE9

border

#D4C8C5

text

#150804

muted

#837B79

Preview Lab

Preview with #A6311B

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

Preview Lab → · Contrast checker → · Palette generator →