#A0171B#A0171B

#A0171B is a mid, vivid red. Relative luminance 0.082; OKLCH L 45.5% C 0.171 H 26.4°. Best body text is #FFFFFF at 7.98:1 contrast (WCAG AA passes).

Color values

HEX	#A0171B
RGB	rgb(160, 23, 27)
HSL	hsl(358, 75%, 36%)
HSV	hsv(358, 86%, 63%)
CMYK	cmyk(0%, 85.6%, 83.1%, 37.3%)
CIE-LAB	lab(34.33, 53.28, 35.61)
CIE-LCH	lch(34.33, 64.08, 33.76°)
OKLab	oklab(45.45% 0.1527 0.0758)
OKLCH	oklch(45.45% 0.171 26.4)
XYZ	xyz(15.0033, 8.1680, 1.8233)
Luminance	0.0817 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#A0171B #17A09C

analogous

#A0175F #A0171B #A05717

triadic

#A0171B #1BA017 #171BA0

tetradic

#A0171B #5FA017 #17A09C #5717A0

square

#A0171B #5FA017 #17A09C #5717A0

split-complementary

#A0171B #17A057 #175FA0

monochromatic

#350809 #6A0F12 #A0171B #D61F24 #E54C51

Accessibility & contrast

On white

7.98

#A0171B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.63

#A0171B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #A0171B

7.98:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##A0171B	#FFFFFF	#000000	##FFFFFF
##A0171B	1.00	7.98	2.63	7.98
#FFFFFF	7.98	1.00	21.00	1.00
#000000	2.63	21.00	1.00	21.00
##FFFFFF	7.98	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#453E19

Deuteranopia (green-blind)

#665B14

Tritanopia (blue-blind)

#B1001B

Achromatopsia (no color)

#515151

Design tokens & code

CSS

--color: #a0171b;
/* rgb */ color: rgb(160, 23, 27);
/* oklch */ color: oklch(45.5% 0.171 26.4);

Tailwind

colors: {
  custom: {
    50: '#c66558',
    500: '#a0171b',
    950: '#000000',
  },
}

SCSS

$custom: #a0171b;
$custom-light: #c66558;
$custom-dark: #000000;

JSON

{
  "hex": "#a0171b",
  "rgb": {
    "r": 160,
    "g": 23,
    "b": 27
  },
  "hsl": {
    "h": 358.248,
    "s": 74.863,
    "l": 35.882
  },
  "oklch": {
    "l": 0.45452,
    "c": 0.1705,
    "h": 26.4
  },
  "luminance": 0.08166
}

Semantic roles & 50–950 ramp

primary

#A0171B

secondary

#4CC7C3

accent

#F1EC36

background

#FDF6F5

surface

#FAEBE9

border

#D3C6C5

text

#150603

muted

#837A78

Preview Lab

Preview with #A0171B

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

Preview Lab → · Contrast checker → · Palette generator →