#B03331#B03331

#B03331 is a mid, vivid red. Relative luminance 0.118; OKLCH L 51.0% C 0.162 H 25.8°. Best body text is #FFFFFF at 6.24:1 contrast (WCAG AA passes).

Color values

HEX	#B03331
RGB	rgb(176, 51, 49)
HSL	hsl(1, 56%, 44%)
HSV	hsv(1, 72%, 69%)
CMYK	cmyk(0%, 71%, 72.2%, 31%)
CIE-LAB	lab(40.93, 50.23, 30.84)
CIE-LCH	lch(40.93, 58.94, 31.55°)
OKLab	oklab(51.02% 0.1459 0.0704)
OKLCH	oklch(51.02% 0.162 25.8)
XYZ	xyz(19.6449, 11.8224, 4.1527)
Luminance	0.1182 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B03331 #31AEB0

analogous

#B0316F #B03331 #B07331

triadic

#B03331 #31B033 #3331B0

tetradic

#B03331 #6FB031 #31AEB0 #7331B0

square

#B03331 #6FB031 #31AEB0 #7331B0

split-complementary

#B03331 #31B073 #316FB0

monochromatic

#501716 #802524 #B03331 #CE5250 #DC8180

Accessibility & contrast

On white

6.24

#B03331 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.36

#B03331 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B03331

6.24:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B03331	#FFFFFF	#000000	##FFFFFF
##B03331	1.00	6.24	3.36	6.24
#FFFFFF	6.24	1.00	21.00	1.00
#000000	3.36	21.00	1.00	21.00
##FFFFFF	6.24	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#574F30

Deuteranopia (green-blind)

#766A2D

Tritanopia (blue-blind)

#C20434

Achromatopsia (no color)

#606060

Design tokens & code

CSS

--color: #b03331;
/* rgb */ color: rgb(176, 51, 49);
/* oklch */ color: oklch(51.0% 0.162 25.8);

Tailwind

colors: {
  custom: {
    50: '#d07369',
    500: '#b03331',
    950: '#000000',
  },
}

SCSS

$custom: #b03331;
$custom-light: #d07369;
$custom-dark: #000000;

JSON

{
  "hex": "#b03331",
  "rgb": {
    "r": 176,
    "g": 51,
    "b": 49
  },
  "hsl": {
    "h": 0.945,
    "s": 56.444,
    "l": 44.118
  },
  "oklch": {
    "l": 0.51015,
    "c": 0.16196,
    "h": 25.8
  },
  "luminance": 0.1182
}

Semantic roles & 50–950 ramp

primary

#B03331

secondary

#78C3C5

accent

#DDE048

background

#FDF7F6

surface

#FBEDEB

border

#D4C8C6

text

#150906

muted

#837B7A

Preview Lab

Preview with #B03331

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

Preview Lab → · Contrast checker → · Palette generator →