#A6381B#A6381B

#A6381B is a mid, vivid red. Relative luminance 0.110; OKLCH L 49.6% C 0.151 H 35.4°. Best body text is #FFFFFF at 6.56:1 contrast (WCAG AA passes).

Color values

HEX	#A6381B
RGB	rgb(166, 56, 27)
HSL	hsl(13, 72%, 38%)
HSV	hsv(13, 84%, 65%)
CMYK	cmyk(0%, 66.3%, 83.7%, 34.9%)
CIE-LAB	lab(39.61, 43.88, 40.99)
CIE-LCH	lch(39.61, 60.05, 43.05°)
OKLab	oklab(49.61% 0.1228 0.0871)
OKLCH	oklch(49.61% 0.151 35.4)
XYZ	xyz(17.3399, 11.0170, 2.2502)
Luminance	0.1101 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#A6381B #1B89A6

analogous

#A61B43 #A6381B #A67D1B

triadic

#A6381B #1BA638 #381BA6

tetradic

#A6381B #43A61B #1B89A6 #7D1BA6

square

#A6381B #43A61B #1B89A6 #7D1BA6

split-complementary

#A6381B #1BA67D #1B43A6

monochromatic

#3D140A #712612 #A6381B #DB4A24 #E47558

Accessibility & contrast

On white

6.56

#A6381B on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.20

#A6381B on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #A6381B

6.56:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##A6381B	#FFFFFF	#000000	##FFFFFF
##A6381B	1.00	6.56	3.20	6.56
#FFFFFF	6.56	1.00	21.00	1.00
#000000	3.20	21.00	1.00	21.00
##FFFFFF	6.56	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#584E16

Deuteranopia (green-blind)

#736616

Tritanopia (blue-blind)

#B71732

Achromatopsia (no color)

#5D5D5D

Design tokens & code

CSS

--color: #a6381b;
/* rgb */ color: rgb(166, 56, 27);
/* oklch */ color: oklch(49.6% 0.151 35.4);

Tailwind

colors: {
  custom: {
    50: '#c9745a',
    500: '#a6381b',
    950: '#000000',
  },
}

SCSS

$custom: #a6381b;
$custom-light: #c9745a;
$custom-dark: #000000;

JSON

{
  "hex": "#a6381b",
  "rgb": {
    "r": 166,
    "g": 56,
    "b": 27
  },
  "hsl": {
    "h": 12.518,
    "s": 72.021,
    "l": 37.843
  },
  "oklch": {
    "l": 0.49607,
    "c": 0.15056,
    "h": 35.4
  },
  "luminance": 0.11014
}

Semantic roles & 50–950 ramp

primary

#A6381B

secondary

#56AFC7

accent

#C9EF39

background

#FDF7F5

surface

#FAEDE9

border

#D3C8C5

text

#150904

muted

#837B79

Preview Lab

Preview with #A6381B

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

Preview Lab → · Contrast checker → · Palette generator →