#B03131#B03131

#B03131 is a mid, vivid red. Relative luminance 0.116; OKLCH L 50.8% C 0.164 H 25.2°. Best body text is #FFFFFF at 6.31:1 contrast (WCAG AA passes).

Color values

HEX	#B03131
RGB	rgb(176, 49, 49)
HSL	hsl(0, 56%, 44%)
HSV	hsv(0, 72%, 69%)
CMYK	cmyk(0%, 72.2%, 72.2%, 31%)
CIE-LAB	lab(40.66, 50.99, 30.52)
CIE-LCH	lch(40.66, 59.42, 30.90°)
OKLab	oklab(50.81% 0.1483 0.0697)
OKLCH	oklch(50.81% 0.164 25.2)
XYZ	xyz(19.5594, 11.6514, 4.1242)
Luminance	0.1165 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B03131 #31B0B0

analogous

#B03171 #B03131 #B07131

triadic

#B03131 #31B031 #3131B0

tetradic

#B03131 #71B031 #31B0B0 #7131B0

square

#B03131 #71B031 #31B0B0 #7131B0

split-complementary

#B03131 #31B071 #3171B0

monochromatic

#501616 #802424 #B03131 #CE5050 #DC8080

Accessibility & contrast

On white

6.31

#B03131 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.33

#B03131 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B03131

6.31:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B03131	#FFFFFF	#000000	##FFFFFF
##B03131	1.00	6.31	3.33	6.31
#FFFFFF	6.31	1.00	21.00	1.00
#000000	3.33	21.00	1.00	21.00
##FFFFFF	6.31	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#564E30

Deuteranopia (green-blind)

#756A2D

Tritanopia (blue-blind)

#C20033

Achromatopsia (no color)

#606060

Design tokens & code

CSS

--color: #b03131;
/* rgb */ color: rgb(176, 49, 49);
/* oklch */ color: oklch(50.8% 0.164 25.2);

Tailwind

colors: {
  custom: {
    50: '#d07269',
    500: '#b03131',
    950: '#000000',
  },
}

SCSS

$custom: #b03131;
$custom-light: #d07269;
$custom-dark: #000000;

JSON

{
  "hex": "#b03131",
  "rgb": {
    "r": 176,
    "g": 49,
    "b": 49
  },
  "hsl": {
    "h": 0,
    "s": 56.444,
    "l": 44.118
  },
  "oklch": {
    "l": 0.50809,
    "c": 0.16382,
    "h": 25.2
  },
  "luminance": 0.11648
}

Semantic roles & 50–950 ramp

primary

#B03131

secondary

#78C5C5

accent

#E0E048

background

#FDF7F6

surface

#FBEDEB

border

#D4C8C6

text

#150806

muted

#837B7A

Preview Lab

Preview with #B03131

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

Preview Lab → · Contrast checker → · Palette generator →