#A7311B#A7311B

#A7311B is a mid, vivid red. Relative luminance 0.105; OKLCH L 49.0% C 0.158 H 32.7°. Best body text is #FFFFFF at 6.78:1 contrast (WCAG AA passes).

Color values

HEX	#A7311B
RGB	rgb(167, 49, 27)
HSL	hsl(9, 72%, 38%)
HSV	hsv(9, 84%, 65%)
CMYK	cmyk(0%, 70.7%, 83.8%, 34.5%)
CIE-LAB	lab(38.71, 47.16, 40.24)
CIE-LCH	lch(38.71, 62.00, 40.47°)
OKLab	oklab(48.97% 0.1329 0.0853)
OKLCH	oklch(48.97% 0.158 32.7)
XYZ	xyz(17.2345, 10.4939, 2.1547)
Luminance	0.1049 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#A7311B #1B91A7

analogous

#A71B4B #A7311B #A7771B

triadic

#A7311B #1BA731 #311BA7

tetradic

#A7311B #4BA71B #1B91A7 #771BA7

square

#A7311B #4BA71B #1B91A7 #771BA7

split-complementary

#A7311B #1BA777 #1B4BA7

monochromatic

#3E120A #722212 #A7311B #DC4124 #E46E58

Accessibility & contrast

On white

6.78

#A7311B on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.10

#A7311B on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #A7311B

6.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##A7311B	#FFFFFF	#000000	##FFFFFF
##A7311B	1.00	6.78	3.10	6.78
#FFFFFF	6.78	1.00	21.00	1.00
#000000	3.10	21.00	1.00	21.00
##FFFFFF	6.78	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#544B17

Deuteranopia (green-blind)

#716515

Tritanopia (blue-blind)

#B8002D

Achromatopsia (no color)

#5B5B5B

Design tokens & code

CSS

--color: #a7311b;
/* rgb */ color: rgb(167, 49, 27);
/* oklch */ color: oklch(49.0% 0.158 32.7);

Tailwind

colors: {
  custom: {
    50: '#ca715a',
    500: '#a7311b',
    950: '#000000',
  },
}

SCSS

$custom: #a7311b;
$custom-light: #ca715a;
$custom-dark: #000000;

JSON

{
  "hex": "#a7311b",
  "rgb": {
    "r": 167,
    "g": 49,
    "b": 27
  },
  "hsl": {
    "h": 9.429,
    "s": 72.165,
    "l": 38.039
  },
  "oklch": {
    "l": 0.48969,
    "c": 0.15789,
    "h": 32.7
  },
  "luminance": 0.10491
}

Semantic roles & 50–950 ramp

primary

#A7311B

secondary

#56B6C8

accent

#D2EF39

background

#FDF7F5

surface

#FBEDE9

border

#D4C8C5

text

#150804

muted

#837B79

Preview Lab

Preview with #A7311B

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

Preview Lab → · Contrast checker → · Palette generator →