#A1311B#A1311B

#A1311B is a mid, vivid red. Relative luminance 0.099; OKLCH L 47.9% C 0.152 H 33.1°. Best body text is #FFFFFF at 7.07:1 contrast (WCAG AA passes).

Color values

HEX	#A1311B
RGB	rgb(161, 49, 27)
HSL	hsl(10, 71%, 37%)
HSV	hsv(10, 83%, 63%)
CMYK	cmyk(0%, 69.6%, 83.2%, 36.9%)
CIE-LAB	lab(37.58, 45.10, 38.77)
CIE-LCH	lch(37.58, 59.48, 40.69°)
OKLab	oklab(47.91% 0.1271 0.0827)
OKLCH	oklch(47.91% 0.152 33.1)
XYZ	xyz(15.9960, 9.8552, 2.0967)
Luminance	0.0985 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#A1311B #1B8BA1

analogous

#A11B48 #A1311B #A1741B

triadic

#A1311B #1BA131 #311BA1

tetradic

#A1311B #48A11B #1B8BA1 #741BA1

square

#A1311B #48A11B #1B8BA1 #741BA1

split-complementary

#A1311B #1BA174 #1B48A1

monochromatic

#381109 #6D2112 #A1311B #D54124 #E26B54

Accessibility & contrast

On white

7.07

#A1311B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.97

#A1311B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #A1311B

7.07:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##A1311B	#FFFFFF	#000000	##FFFFFF
##A1311B	1.00	7.07	2.97	7.07
#FFFFFF	7.07	1.00	21.00	1.00
#000000	2.97	21.00	1.00	21.00
##FFFFFF	7.07	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#524917

Deuteranopia (green-blind)

#6E6215

Tritanopia (blue-blind)

#B2072D

Achromatopsia (no color)

#585858

Design tokens & code

CSS

--color: #a1311b;
/* rgb */ color: rgb(161, 49, 27);
/* oklch */ color: oklch(47.9% 0.152 33.1);

Tailwind

colors: {
  custom: {
    50: '#c5705a',
    500: '#a1311b',
    950: '#000000',
  },
}

SCSS

$custom: #a1311b;
$custom-light: #c5705a;
$custom-dark: #000000;

JSON

{
  "hex": "#a1311b",
  "rgb": {
    "r": 161,
    "g": 49,
    "b": 27
  },
  "hsl": {
    "h": 9.851,
    "s": 71.277,
    "l": 36.863
  },
  "oklch": {
    "l": 0.47912,
    "c": 0.15159,
    "h": 33.1
  },
  "luminance": 0.09853
}

Semantic roles & 50–950 ramp

primary

#A1311B

secondary

#52B2C5

accent

#D0EE3A

background

#FDF7F5

surface

#FAEDE9

border

#D3C8C5

text

#150804

muted

#837B79

Preview Lab

Preview with #A1311B

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

Preview Lab → · Contrast checker → · Palette generator →