#B03138#B03138

#B03138 is a mid, vivid red. Relative luminance 0.117; OKLCH L 50.9% C 0.163 H 22.3°. Best body text is #FFFFFF at 6.28:1 contrast (WCAG AA passes).

Color values

HEX	#B03138
RGB	rgb(176, 49, 56)
HSL	hsl(357, 56%, 44%)
HSV	hsv(357, 72%, 69%)
CMYK	cmyk(0%, 72.2%, 68.2%, 31%)
CIE-LAB	lab(40.76, 51.34, 26.42)
CIE-LCH	lch(40.76, 57.74, 27.23°)
OKLab	oklab(50.92% 0.1509 0.0618)
OKLCH	oklch(50.92% 0.163 22.3)
XYZ	xyz(19.7187, 11.7152, 4.9636)
Luminance	0.1171 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B03138 #31B0A9

analogous

#B03178 #B03138 #B06A31

triadic

#B03138 #38B031 #3138B0

tetradic

#B03138 #78B031 #31B0A9 #6A31B0

square

#B03138 #78B031 #31B0A9 #6A31B0

split-complementary

#B03138 #31B06A #3178B0

monochromatic

#50161A #802429 #B03138 #CE5057 #DC8085

Accessibility & contrast

On white

6.28

#B03138 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.34

#B03138 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B03138

6.28:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B03138	#FFFFFF	#000000	##FFFFFF
##B03138	1.00	6.28	3.34	6.28
#FFFFFF	6.28	1.00	21.00	1.00
#000000	3.34	21.00	1.00	21.00
##FFFFFF	6.28	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#554F37

Deuteranopia (green-blind)

#756A34

Tritanopia (blue-blind)

#C10135

Achromatopsia (no color)

#606060

Design tokens & code

CSS

--color: #b03138;
/* rgb */ color: rgb(176, 49, 56);
/* oklch */ color: oklch(50.9% 0.163 22.3);

Tailwind

colors: {
  custom: {
    50: '#cf726e',
    500: '#b03138',
    950: '#000000',
  },
}

SCSS

$custom: #b03138;
$custom-light: #cf726e;
$custom-dark: #000000;

JSON

{
  "hex": "#b03138",
  "rgb": {
    "r": 176,
    "g": 49,
    "b": 56
  },
  "hsl": {
    "h": 356.693,
    "s": 56.444,
    "l": 44.118
  },
  "oklch": {
    "l": 0.50919,
    "c": 0.16307,
    "h": 22.3
  },
  "luminance": 0.11712
}

Semantic roles & 50–950 ramp

primary

#B03138

secondary

#78C5C0

accent

#E0D748

background

#FDF7F6

surface

#FBEDEC

border

#D4C8C7

text

#150807

muted

#837B7A

Preview Lab

Preview with #B03138

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

Preview Lab → · Contrast checker → · Palette generator →