#A0181A#A0181A

#A0181A is a mid, vivid red. Relative luminance 0.082; OKLCH L 45.5% C 0.170 H 26.8°. Best body text is #FFFFFF at 7.95:1 contrast (WCAG AA passes).

Color values

HEX	#A0181A
RGB	rgb(160, 24, 26)
HSL	hsl(359, 74%, 36%)
HSV	hsv(359, 85%, 63%)
CMYK	cmyk(0%, 85%, 83.8%, 37.3%)
CIE-LAB	lab(34.40, 53.02, 36.24)
CIE-LCH	lch(34.40, 64.22, 34.35°)
OKLab	oklab(45.5% 0.1517 0.0768)
OKLCH	oklch(45.5% 0.17 26.8)
XYZ	xyz(15.0122, 8.2039, 1.7702)
Luminance	0.0820 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#A0181A #18A09E

analogous

#A0185E #A0181A #A05A18

triadic

#A0181A #1AA018 #181AA0

tetradic

#A0181A #5EA018 #18A09E #5A18A0

square

#A0181A #5EA018 #18A09E #5A18A0

split-complementary

#A0181A #18A05A #185EA0

monochromatic

#360809 #6B1011 #A0181A #D52023 #E44E50

Accessibility & contrast

On white

7.95

#A0181A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.64

#A0181A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #A0181A

7.95:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##A0181A	#FFFFFF	#000000	##FFFFFF
##A0181A	1.00	7.95	2.64	7.95
#FFFFFF	7.95	1.00	21.00	1.00
#000000	2.64	21.00	1.00	21.00
##FFFFFF	7.95	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#463E18

Deuteranopia (green-blind)

#675B12

Tritanopia (blue-blind)

#B1001B

Achromatopsia (no color)

#515151

Design tokens & code

CSS

--color: #a0181a;
/* rgb */ color: rgb(160, 24, 26);
/* oklch */ color: oklch(45.5% 0.170 26.8);

Tailwind

colors: {
  custom: {
    50: '#c66558',
    500: '#a0181a',
    950: '#000000',
  },
}

SCSS

$custom: #a0181a;
$custom-light: #c66558;
$custom-dark: #000000;

JSON

{
  "hex": "#a0181a",
  "rgb": {
    "r": 160,
    "g": 24,
    "b": 26
  },
  "hsl": {
    "h": 359.118,
    "s": 73.913,
    "l": 36.078
  },
  "oklch": {
    "l": 0.45504,
    "c": 0.17001,
    "h": 26.8
  },
  "luminance": 0.08201
}

Semantic roles & 50–950 ramp

primary

#A0181A

secondary

#4DC6C5

accent

#F1EE37

background

#FDF6F5

surface

#FAEBE9

border

#D3C6C5

text

#150603

muted

#837A78

Preview Lab

Preview with #A0181A

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

Preview Lab → · Contrast checker → · Palette generator →