#B5312F#B5312F

#B5312F is a mid, vivid red. Relative luminance 0.122; OKLCH L 51.7% C 0.169 H 26.1°. Best body text is #FFFFFF at 6.10:1 contrast (WCAG AA passes).

Color values

HEX	#B5312F
RGB	rgb(181, 49, 47)
HSL	hsl(1, 59%, 45%)
HSV	hsv(1, 74%, 71%)
CMYK	cmyk(0%, 72.9%, 74%, 29%)
CIE-LAB	lab(41.58, 52.50, 33.00)
CIE-LCH	lch(41.58, 62.01, 32.16°)
OKLab	oklab(51.66% 0.152 0.0744)
OKLCH	oklch(51.66% 0.169 26.1)
XYZ	xyz(20.6698, 12.2288, 3.9608)
Luminance	0.1223 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B5312F #2FB3B5

analogous

#B52F70 #B5312F #B5742F

triadic

#B5312F #2FB531 #312FB5

tetradic

#B5312F #70B52F #2FB3B5 #742FB5

square

#B5312F #70B52F #2FB3B5 #742FB5

split-complementary

#B5312F #2FB574 #2F70B5

monochromatic

#541716 #842422 #B5312F #D15250 #DE8280

Accessibility & contrast

On white

6.10

#B5312F on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.45

#B5312F on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B5312F

6.10:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B5312F	#FFFFFF	#000000	##FFFFFF
##B5312F	1.00	6.10	3.45	6.10
#FFFFFF	6.10	1.00	21.00	1.00
#000000	3.45	21.00	1.00	21.00
##FFFFFF	6.10	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#58502D

Deuteranopia (green-blind)

#796C2A

Tritanopia (blue-blind)

#C70032

Achromatopsia (no color)

#626262

Design tokens & code

CSS

--color: #b5312f;
/* rgb */ color: rgb(181, 49, 47);
/* oklch */ color: oklch(51.7% 0.169 26.1);

Tailwind

colors: {
  custom: {
    50: '#d47368',
    500: '#b5312f',
    950: '#000000',
  },
}

SCSS

$custom: #b5312f;
$custom-light: #d47368;
$custom-dark: #000000;

JSON

{
  "hex": "#b5312f",
  "rgb": {
    "r": 181,
    "g": 49,
    "b": 47
  },
  "hsl": {
    "h": 0.896,
    "s": 58.772,
    "l": 44.706
  },
  "oklch": {
    "l": 0.51659,
    "c": 0.16923,
    "h": 26.1
  },
  "luminance": 0.12226
}

Semantic roles & 50–950 ramp

primary

#B5312F

secondary

#79C6C7

accent

#E0E246

background

#FEF7F6

surface

#FCEDEB

border

#D5C8C6

text

#160906

muted

#847B7A

Preview Lab

Preview with #B5312F

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

Preview Lab → · Contrast checker → · Palette generator →