#B03A31#B03A31

#B03A31 is a mid, vivid red. Relative luminance 0.125; OKLCH L 51.8% C 0.155 H 28.1°. Best body text is #FFFFFF at 6.01:1 contrast (WCAG AA passes).

Color values

HEX	#B03A31
RGB	rgb(176, 58, 49)
HSL	hsl(4, 56%, 44%)
HSV	hsv(4, 72%, 69%)
CMYK	cmyk(0%, 67%, 72.2%, 31%)
CIE-LAB	lab(41.97, 47.39, 32.04)
CIE-LCH	lch(41.97, 57.21, 34.06°)
OKLab	oklab(51.79% 0.1369 0.073)
OKLCH	oklch(51.79% 0.155 28.1)
XYZ	xyz(19.9741, 12.4809, 4.2624)
Luminance	0.1248 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B03A31 #31A7B0

analogous

#B03168 #B03A31 #B07A31

triadic

#B03A31 #31B03A #3A31B0

tetradic

#B03A31 #68B031 #31A7B0 #7A31B0

square

#B03A31 #68B031 #31A7B0 #7A31B0

split-complementary

#B03A31 #31B07A #3168B0

monochromatic

#501A16 #802A24 #B03A31 #CE5950 #DC8680

Accessibility & contrast

On white

6.01

#B03A31 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.50

#B03A31 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B03A31

6.01:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B03A31	#FFFFFF	#000000	##FFFFFF
##B03A31	1.00	6.01	3.50	6.01
#FFFFFF	6.01	1.00	21.00	1.00
#000000	3.50	21.00	1.00	21.00
##FFFFFF	6.01	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5B532F

Deuteranopia (green-blind)

#786D2D

Tritanopia (blue-blind)

#C11939

Achromatopsia (no color)

#636363

Design tokens & code

CSS

--color: #b03a31;
/* rgb */ color: rgb(176, 58, 49);
/* oklch */ color: oklch(51.8% 0.155 28.1);

Tailwind

colors: {
  custom: {
    50: '#cf7769',
    500: '#b03a31',
    950: '#000000',
  },
}

SCSS

$custom: #b03a31;
$custom-light: #cf7769;
$custom-dark: #000000;

JSON

{
  "hex": "#b03a31",
  "rgb": {
    "r": 176,
    "g": 58,
    "b": 49
  },
  "hsl": {
    "h": 4.252,
    "s": 56.444,
    "l": 44.118
  },
  "oklch": {
    "l": 0.51791,
    "c": 0.15519,
    "h": 28.1
  },
  "luminance": 0.12478
}

Semantic roles & 50–950 ramp

primary

#B03A31

secondary

#78BFC5

accent

#D5E048

background

#FDF7F6

surface

#FBEDEB

border

#D4C8C6

text

#150906

muted

#837B7A

Preview Lab

Preview with #B03A31

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

Preview Lab → · Contrast checker → · Palette generator →