#B23731#B23731

#B23731 is a mid, vivid red. Relative luminance 0.124; OKLCH L 51.8% C 0.160 H 27.1°. Best body text is #FFFFFF at 6.03:1 contrast (WCAG AA passes).

Color values

HEX	#B23731
RGB	rgb(178, 55, 49)
HSL	hsl(3, 57%, 45%)
HSV	hsv(3, 72%, 70%)
CMYK	cmyk(0%, 69.1%, 72.5%, 30.2%)
CIE-LAB	lab(41.88, 49.31, 32.03)
CIE-LCH	lch(41.88, 58.80, 33.01°)
OKLab	oklab(51.79% 0.1427 0.0729)
OKLCH	oklch(51.79% 0.16 27.1)
XYZ	xyz(20.2829, 12.4221, 4.2348)
Luminance	0.1242 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B23731 #31ACB2

analogous

#B2316B #B23731 #B27831

triadic

#B23731 #31B237 #3731B2

tetradic

#B23731 #6BB231 #31ACB2 #7831B2

square

#B23731 #6BB231 #31ACB2 #7831B2

split-complementary

#B23731 #31B278 #316BB2

monochromatic

#521917 #822824 #B23731 #CF5751 #DC8581

Accessibility & contrast

On white

6.03

#B23731 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.48

#B23731 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B23731

6.03:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B23731	#FFFFFF	#000000	##FFFFFF
##B23731	1.00	6.03	3.48	6.03
#FFFFFF	6.03	1.00	21.00	1.00
#000000	3.48	21.00	1.00	21.00
##FFFFFF	6.03	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5A522F

Deuteranopia (green-blind)

#786D2D

Tritanopia (blue-blind)

#C41037

Achromatopsia (no color)

#636363

Design tokens & code

CSS

--color: #b23731;
/* rgb */ color: rgb(178, 55, 49);
/* oklch */ color: oklch(51.8% 0.160 27.1);

Tailwind

colors: {
  custom: {
    50: '#d17569',
    500: '#b23731',
    950: '#000000',
  },
}

SCSS

$custom: #b23731;
$custom-light: #d17569;
$custom-dark: #000000;

JSON

{
  "hex": "#b23731",
  "rgb": {
    "r": 178,
    "g": 55,
    "b": 49
  },
  "hsl": {
    "h": 2.791,
    "s": 56.828,
    "l": 44.51
  },
  "oklch": {
    "l": 0.51791,
    "c": 0.16026,
    "h": 27.1
  },
  "luminance": 0.12419
}

Semantic roles & 50–950 ramp

primary

#B23731

secondary

#79C2C5

accent

#D9E048

background

#FDF7F6

surface

#FBEDEB

border

#D4C8C6

text

#150906

muted

#837B7A

Preview Lab

Preview with #B23731

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

Preview Lab → · Contrast checker → · Palette generator →