#B23131#B23131

#B23131 is a mid, vivid red. Relative luminance 0.119; OKLCH L 51.2% C 0.166 H 25.2°. Best body text is #FFFFFF at 6.22:1 contrast (WCAG AA passes).

Color values

HEX	#B23131
RGB	rgb(178, 49, 49)
HSL	hsl(0, 57%, 45%)
HSV	hsv(0, 72%, 70%)
CMYK	cmyk(0%, 72.5%, 72.5%, 30.2%)
CIE-LAB	lab(41.03, 51.63, 31.05)
CIE-LCH	lch(41.03, 60.25, 31.03°)
OKLab	oklab(51.16% 0.15 0.0708)
OKLCH	oklch(51.16% 0.166 25.2)
XYZ	xyz(20.0150, 11.8864, 4.1455)
Luminance	0.1188 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B23131 #31B2B2

analogous

#B23172 #B23131 #B27231

triadic

#B23131 #31B231 #3131B2

tetradic

#B23131 #72B231 #31B2B2 #7231B2

square

#B23131 #72B231 #31B2B2 #7231B2

split-complementary

#B23131 #31B272 #3172B2

monochromatic

#521717 #822424 #B23131 #CF5151 #DC8181

Accessibility & contrast

On white

6.22

#B23131 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.38

#B23131 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B23131

6.22:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B23131	#FFFFFF	#000000	##FFFFFF
##B23131	1.00	6.22	3.38	6.22
#FFFFFF	6.22	1.00	21.00	1.00
#000000	3.38	21.00	1.00	21.00
##FFFFFF	6.22	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#564F30

Deuteranopia (green-blind)

#776B2D

Tritanopia (blue-blind)

#C40033

Achromatopsia (no color)

#616161

Design tokens & code

CSS

--color: #b23131;
/* rgb */ color: rgb(178, 49, 49);
/* oklch */ color: oklch(51.2% 0.166 25.2);

Tailwind

colors: {
  custom: {
    50: '#d17269',
    500: '#b23131',
    950: '#000000',
  },
}

SCSS

$custom: #b23131;
$custom-light: #d17269;
$custom-dark: #000000;

JSON

{
  "hex": "#b23131",
  "rgb": {
    "r": 178,
    "g": 49,
    "b": 49
  },
  "hsl": {
    "h": 0,
    "s": 56.828,
    "l": 44.51
  },
  "oklch": {
    "l": 0.5116,
    "c": 0.16589,
    "h": 25.2
  },
  "luminance": 0.11883
}

Semantic roles & 50–950 ramp

primary

#B23131

secondary

#79C5C5

accent

#E0E048

background

#FDF7F6

surface

#FBEDEB

border

#D4C8C6

text

#160906

muted

#847B7A

Preview Lab

Preview with #B23131

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

Preview Lab → · Contrast checker → · Palette generator →