#B23B31#B23B31

#B23B31 is a mid, vivid red. Relative luminance 0.128; OKLCH L 52.2% C 0.156 H 28.4°. Best body text is #FFFFFF at 5.89:1 contrast (WCAG AA passes).

Color values

HEX	#B23B31
RGB	rgb(178, 59, 49)
HSL	hsl(5, 57%, 45%)
HSV	hsv(5, 72%, 70%)
CMYK	cmyk(0%, 66.9%, 72.5%, 30.2%)
CIE-LAB	lab(42.49, 47.66, 32.73)
CIE-LCH	lch(42.49, 57.81, 34.48°)
OKLab	oklab(52.25% 0.1375 0.0744)
OKLCH	oklch(52.25% 0.156 28.4)
XYZ	xyz(20.4807, 12.8176, 4.3007)
Luminance	0.1281 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B23B31 #31A8B2

analogous

#B23168 #B23B31 #B27C31

triadic

#B23B31 #31B23B #3B31B2

tetradic

#B23B31 #68B231 #31A8B2 #7C31B2

square

#B23B31 #68B231 #31A8B2 #7C31B2

split-complementary

#B23B31 #31B27C #3168B2

monochromatic

#521B17 #822B24 #B23B31 #CF5B51 #DC8881

Accessibility & contrast

On white

5.89

#B23B31 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.56

#B23B31 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B23B31

5.89:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B23B31	#FFFFFF	#000000	##FFFFFF
##B23B31	1.00	5.89	3.56	5.89
#FFFFFF	5.89	1.00	21.00	1.00
#000000	3.56	21.00	1.00	21.00
##FFFFFF	5.89	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5C542F

Deuteranopia (green-blind)

#7A6E2D

Tritanopia (blue-blind)

#C41A3A

Achromatopsia (no color)

#646464

Design tokens & code

CSS

--color: #b23b31;
/* rgb */ color: rgb(178, 59, 49);
/* oklch */ color: oklch(52.2% 0.156 28.4);

Tailwind

colors: {
  custom: {
    50: '#d17769',
    500: '#b23b31',
    950: '#000000',
  },
}

SCSS

$custom: #b23b31;
$custom-light: #d17769;
$custom-dark: #000000;

JSON

{
  "hex": "#b23b31",
  "rgb": {
    "r": 178,
    "g": 59,
    "b": 49
  },
  "hsl": {
    "h": 4.651,
    "s": 56.828,
    "l": 44.51
  },
  "oklch": {
    "l": 0.52246,
    "c": 0.15637,
    "h": 28.4
  },
  "luminance": 0.12815
}

Semantic roles & 50–950 ramp

primary

#B23B31

secondary

#79C0C5

accent

#D4E048

background

#FDF7F6

surface

#FBEEEB

border

#D4C9C6

text

#150906

muted

#837B7A

Preview Lab

Preview with #B23B31

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

Preview Lab → · Contrast checker → · Palette generator →