#B23B21#B23B21

#B23B21 is a mid, vivid red. Relative luminance 0.127; OKLCH L 52.1% C 0.159 H 33.8°. Best body text is #FFFFFF at 5.93:1 contrast (WCAG AA passes).

Color values

HEX	#B23B21
RGB	rgb(178, 59, 33)
HSL	hsl(11, 69%, 41%)
HSV	hsv(11, 81%, 70%)
CMYK	cmyk(0%, 66.9%, 81.5%, 30.2%)
CIE-LAB	lab(42.32, 47.02, 41.32)
CIE-LCH	lch(42.32, 62.60, 41.31°)
OKLab	oklab(52.06% 0.1324 0.0888)
OKLCH	oklch(52.06% 0.159 33.8)
XYZ	xyz(20.2009, 12.7057, 2.8273)
Luminance	0.1270 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B23B21 #2198B2

analogous

#B22150 #B23B21 #B28421

triadic

#B23B21 #21B23B #3B21B2

tetradic

#B23B21 #50B221 #2198B2 #8421B2

square

#B23B21 #50B221 #2198B2 #8421B2

split-complementary

#B23B21 #21B284 #2150B2

monochromatic

#4B190E #7E2A17 #B23B21 #DA5436 #E3806A

Accessibility & contrast

On white

5.93

#B23B21 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.54

#B23B21 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B23B21

5.93:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B23B21	#FFFFFF	#000000	##FFFFFF
##B23B21	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)

#5E531D

Deuteranopia (green-blind)

#7B6E1C

Tritanopia (blue-blind)

#C41636

Achromatopsia (no color)

#646464

Design tokens & code

CSS

--color: #b23b21;
/* rgb */ color: rgb(178, 59, 33);
/* oklch */ color: oklch(52.1% 0.159 33.8);

Tailwind

colors: {
  custom: {
    50: '#d2775f',
    500: '#b23b21',
    950: '#000000',
  },
}

SCSS

$custom: #b23b21;
$custom-light: #d2775f;
$custom-dark: #000000;

JSON

{
  "hex": "#b23b21",
  "rgb": {
    "r": 178,
    "g": 59,
    "b": 33
  },
  "hsl": {
    "h": 10.759,
    "s": 68.72,
    "l": 41.373
  },
  "oklch": {
    "l": 0.52064,
    "c": 0.15942,
    "h": 33.8
  },
  "luminance": 0.12703
}

Semantic roles & 50–950 ramp

primary

#B23B21

secondary

#66B7C9

accent

#CCEC3C

background

#FEF7F5

surface

#FCEDE9

border

#D5C8C5

text

#160904

muted

#847B79

Preview Lab

Preview with #B23B21

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

Preview Lab → · Contrast checker → · Palette generator →