#B23A31#B23A31

#B23A31 is a mid, vivid red. Relative luminance 0.127; OKLCH L 52.1% C 0.157 H 28.1°. Best body text is #FFFFFF at 5.93:1 contrast (WCAG AA passes).

Color values

HEX	#B23A31
RGB	rgb(178, 58, 49)
HSL	hsl(4, 57%, 45%)
HSV	hsv(4, 72%, 70%)
CMYK	cmyk(0%, 67.4%, 72.5%, 30.2%)
CIE-LAB	lab(42.33, 48.08, 32.55)
CIE-LCH	lch(42.33, 58.06, 34.10°)
OKLab	oklab(52.13% 0.1389 0.074)
OKLCH	oklch(52.13% 0.157 28.1)
XYZ	xyz(20.4297, 12.7158, 4.2838)
Luminance	0.1271 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B23A31 #31A9B2

analogous

#B23169 #B23A31 #B27B31

triadic

#B23A31 #31B23A #3A31B2

tetradic

#B23A31 #69B231 #31A9B2 #7B31B2

square

#B23A31 #69B231 #31A9B2 #7B31B2

split-complementary

#B23A31 #31B27B #3169B2

monochromatic

#521B17 #822A24 #B23A31 #CF5A51 #DC8781

Accessibility & contrast

On white

5.93

#B23A31 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.54

#B23A31 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B23A31

5.93:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B23A31	#FFFFFF	#000000	##FFFFFF
##B23A31	1.00	5.93	3.54	5.93
#FFFFFF	5.93	1.00	21.00	1.00
#000000	3.54	21.00	1.00	21.00
##FFFFFF	5.93	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5C532F

Deuteranopia (green-blind)

#7A6E2D

Tritanopia (blue-blind)

#C41839

Achromatopsia (no color)

#646464

Design tokens & code

CSS

--color: #b23a31;
/* rgb */ color: rgb(178, 58, 49);
/* oklch */ color: oklch(52.1% 0.157 28.1);

Tailwind

colors: {
  custom: {
    50: '#d17769',
    500: '#b23a31',
    950: '#000000',
  },
}

SCSS

$custom: #b23a31;
$custom-light: #d17769;
$custom-dark: #000000;

JSON

{
  "hex": "#b23a31",
  "rgb": {
    "r": 178,
    "g": 58,
    "b": 49
  },
  "hsl": {
    "h": 4.186,
    "s": 56.828,
    "l": 44.51
  },
  "oklch": {
    "l": 0.5213,
    "c": 0.15735,
    "h": 28.1
  },
  "luminance": 0.12713
}

Semantic roles & 50–950 ramp

primary

#B23A31

secondary

#79C0C5

accent

#D5E048

background

#FDF7F6

surface

#FBEDEB

border

#D4C8C6

text

#150906

muted

#837B7A

Preview Lab

Preview with #B23A31

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

Preview Lab → · Contrast checker → · Palette generator →