#B13B31#B13B31

#B13B31 is a mid, vivid red. Relative luminance 0.127; OKLCH L 52.1% C 0.155 H 28.4°. Best body text is #FFFFFF at 5.93:1 contrast (WCAG AA passes).

Color values

HEX	#B13B31
RGB	rgb(177, 59, 49)
HSL	hsl(5, 57%, 44%)
HSV	hsv(5, 72%, 69%)
CMYK	cmyk(0%, 66.7%, 72.3%, 30.6%)
CIE-LAB	lab(42.31, 47.31, 32.47)
CIE-LCH	lch(42.31, 57.39, 34.46°)
OKLab	oklab(52.08% 0.1366 0.0739)
OKLCH	oklch(52.08% 0.155 28.4)
XYZ	xyz(20.2520, 12.6997, 4.2900)
Luminance	0.1270 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B13B31 #31A7B1

analogous

#B13167 #B13B31 #B17B31

triadic

#B13B31 #31B13B #3B31B1

tetradic

#B13B31 #67B131 #31A7B1 #7B31B1

square

#B13B31 #67B131 #31A7B1 #7B31B1

split-complementary

#B13B31 #31B17B #3167B1

monochromatic

#511B16 #812B24 #B13B31 #CF5A51 #DC8880

Accessibility & contrast

On white

5.93

#B13B31 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.54

#B13B31 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B13B31

5.93:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B13B31	#FFFFFF	#000000	##FFFFFF
##B13B31	1.00	5.93	3.54	5.93
#FFFFFF	5.93	1.00	21.00	1.00
#000000	3.54	21.00	1.00	21.00
##FFFFFF	5.93	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5C542F

Deuteranopia (green-blind)

#796D2D

Tritanopia (blue-blind)

#C31B3A

Achromatopsia (no color)

#646464

Design tokens & code

CSS

--color: #b13b31;
/* rgb */ color: rgb(177, 59, 49);
/* oklch */ color: oklch(52.1% 0.155 28.4);

Tailwind

colors: {
  custom: {
    50: '#d07769',
    500: '#b13b31',
    950: '#000000',
  },
}

SCSS

$custom: #b13b31;
$custom-light: #d07769;
$custom-dark: #000000;

JSON

{
  "hex": "#b13b31",
  "rgb": {
    "r": 177,
    "g": 59,
    "b": 49
  },
  "hsl": {
    "h": 4.688,
    "s": 56.637,
    "l": 44.314
  },
  "oklch": {
    "l": 0.52078,
    "c": 0.15529,
    "h": 28.4
  },
  "luminance": 0.12697
}

Semantic roles & 50–950 ramp

primary

#B13B31

secondary

#79BFC5

accent

#D4E048

background

#FDF7F6

surface

#FBEEEB

border

#D4C9C6

text

#150906

muted

#837B7A

Preview Lab

Preview with #B13B31

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

Preview Lab → · Contrast checker → · Palette generator →