#A01B1B#A01B1B

#A01B1B is a mid, vivid red. Relative luminance 0.083; OKLCH L 45.7% C 0.168 H 27.1°. Best body text is #FFFFFF at 7.87:1 contrast (WCAG AA passes).

Color values

HEX	#A01B1B
RGB	rgb(160, 27, 27)
HSL	hsl(0, 71%, 37%)
HSV	hsv(0, 83%, 63%)
CMYK	cmyk(0%, 83.1%, 83.1%, 37.3%)
CIE-LAB	lab(34.68, 52.29, 35.95)
CIE-LCH	lch(34.68, 63.45, 34.51°)
OKLab	oklab(45.71% 0.1496 0.0765)
OKLCH	oklch(45.71% 0.168 27.1)
XYZ	xyz(15.0889, 8.3391, 1.8518)
Luminance	0.0834 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#A01B1B #1BA0A0

analogous

#A01B5E #A01B1B #A05E1B

triadic

#A01B1B #1BA01B #1B1BA0

tetradic

#A01B1B #5EA01B #1BA0A0 #5E1BA0

square

#A01B1B #5EA01B #1BA0A0 #5E1BA0

split-complementary

#A01B1B #1BA05E #1B5EA0

monochromatic

#370909 #6C1212 #A01B1B #D42424 #E25353

Accessibility & contrast

On white

7.87

#A01B1B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.67

#A01B1B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #A01B1B

7.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##A01B1B	#FFFFFF	#000000	##FFFFFF
##A01B1B	1.00	7.87	2.67	7.87
#FFFFFF	7.87	1.00	21.00	1.00
#000000	2.67	21.00	1.00	21.00
##FFFFFF	7.87	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#473F19

Deuteranopia (green-blind)

#675C14

Tritanopia (blue-blind)

#B1001D

Achromatopsia (no color)

#525252

Design tokens & code

CSS

--color: #a01b1b;
/* rgb */ color: rgb(160, 27, 27);
/* oklch */ color: oklch(45.7% 0.168 27.1);

Tailwind

colors: {
  custom: {
    50: '#c66658',
    500: '#a01b1b',
    950: '#000000',
  },
}

SCSS

$custom: #a01b1b;
$custom-light: #c66658;
$custom-dark: #000000;

JSON

{
  "hex": "#a01b1b",
  "rgb": {
    "r": 160,
    "g": 27,
    "b": 27
  },
  "hsl": {
    "h": 0,
    "s": 71.123,
    "l": 36.667
  },
  "oklch": {
    "l": 0.45711,
    "c": 0.16805,
    "h": 27.1
  },
  "luminance": 0.08337
}

Semantic roles & 50–950 ramp

primary

#A01B1B

secondary

#52C5C5

accent

#EEEE3A

background

#FDF6F5

surface

#FAEBE9

border

#D3C6C5

text

#150703

muted

#837A78

Preview Lab

Preview with #A01B1B

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

Preview Lab → · Contrast checker → · Palette generator →