#A51F2B#A51F2B

#A51F2B is a mid, vivid red. Relative luminance 0.092; OKLCH L 47.1% C 0.168 H 22.6°. Best body text is #FFFFFF at 7.42:1 contrast (WCAG AA passes).

Color values

HEX	#A51F2B
RGB	rgb(165, 31, 43)
HSL	hsl(355, 68%, 38%)
HSV	hsv(355, 81%, 65%)
CMYK	cmyk(0%, 81.2%, 73.9%, 35.3%)
CIE-LAB	lab(36.28, 53.25, 28.51)
CIE-LCH	lch(36.28, 60.41, 28.16°)
OKLab	oklab(47.14% 0.1556 0.0647)
OKLCH	oklch(47.14% 0.168 22.6)
XYZ	xyz(16.4450, 9.1563, 3.1865)
Luminance	0.0915 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#A51F2B #1FA599

analogous

#A51F6E #A51F2B #A5561F

triadic

#A51F2B #2BA51F #1F2BA5

tetradic

#A51F2B #6EA51F #1FA599 #561FA5

square

#A51F2B #6EA51F #1FA599 #561FA5

split-complementary

#A51F2B #1FA556 #1F6EA5

monochromatic

#3E0C10 #71151E #A51F2B #D72A3A #E15E69

Accessibility & contrast

On white

7.42

#A51F2B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.83

#A51F2B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #A51F2B

7.42:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##A51F2B	#FFFFFF	#000000	##FFFFFF
##A51F2B	1.00	7.42	2.83	7.42
#FFFFFF	7.42	1.00	21.00	1.00
#000000	2.83	21.00	1.00	21.00
##FFFFFF	7.42	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#49432A

Deuteranopia (green-blind)

#6A6026

Tritanopia (blue-blind)

#B60025

Achromatopsia (no color)

#555555

Design tokens & code

CSS

--color: #a51f2b;
/* rgb */ color: rgb(165, 31, 43);
/* oklch */ color: oklch(47.1% 0.168 22.6);

Tailwind

colors: {
  custom: {
    50: '#c86964',
    500: '#a51f2b',
    950: '#000000',
  },
}

SCSS

$custom: #a51f2b;
$custom-light: #c86964;
$custom-dark: #000000;

JSON

{
  "hex": "#a51f2b",
  "rgb": {
    "r": 165,
    "g": 31,
    "b": 43
  },
  "hsl": {
    "h": 354.627,
    "s": 68.367,
    "l": 38.431
  },
  "oklch": {
    "l": 0.47142,
    "c": 0.16848,
    "h": 22.6
  },
  "luminance": 0.09154
}

Semantic roles & 50–950 ramp

primary

#A51F2B

secondary

#5BC5BC

accent

#EBDC3D

background

#FDF6F6

surface

#FAECEB

border

#D3C7C6

text

#150705

muted

#837A7A

Preview Lab

Preview with #A51F2B

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

Preview Lab → · Contrast checker → · Palette generator →