#B21F19#B21F19

#B21F19 is a mid, vivid red. Relative luminance 0.105; OKLCH L 49.4% C 0.183 H 28.6°. Best body text is #FFFFFF at 6.77:1 contrast (WCAG AA passes).

Color values

HEX	#B21F19
RGB	rgb(178, 31, 25)
HSL	hsl(2, 75%, 40%)
HSV	hsv(2, 86%, 70%)
CMYK	cmyk(0%, 82.6%, 86%, 30.2%)
CIE-LAB	lab(38.76, 56.48, 42.10)
CIE-LCH	lch(38.76, 70.44, 36.70°)
OKLab	oklab(49.39% 0.1604 0.0874)
OKLCH	oklch(49.39% 0.183 28.6)
XYZ	xyz(19.0280, 10.5183, 1.9479)
Luminance	0.1051 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B21F19 #19ACB2

analogous

#B21960 #B21F19 #B26C19

triadic

#B21F19 #19B21F #1F19B2

tetradic

#B21F19 #60B219 #19ACB2 #6C19B2

square

#B21F19 #60B219 #19ACB2 #6C19B2

split-complementary

#B21F19 #19B26C #1960B2

monochromatic

#470C0A #7C1611 #B21F19 #E12F27 #E8635D

Accessibility & contrast

On white

6.77

#B21F19 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.10

#B21F19 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B21F19

6.77:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B21F19	#FFFFFF	#000000	##FFFFFF
##B21F19	1.00	6.77	3.10	6.77
#FFFFFF	6.77	1.00	21.00	1.00
#000000	3.10	21.00	1.00	21.00
##FFFFFF	6.77	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#504716

Deuteranopia (green-blind)

#74670F

Tritanopia (blue-blind)

#C50020

Achromatopsia (no color)

#5B5B5B

Design tokens & code

CSS

--color: #b21f19;
/* rgb */ color: rgb(178, 31, 25);
/* oklch */ color: oklch(49.4% 0.183 28.6);

Tailwind

colors: {
  custom: {
    50: '#d36b58',
    500: '#b21f19',
    950: '#000000',
  },
}

SCSS

$custom: #b21f19;
$custom-light: #d36b58;
$custom-dark: #000000;

JSON

{
  "hex": "#b21f19",
  "rgb": {
    "r": 178,
    "g": 31,
    "b": 25
  },
  "hsl": {
    "h": 2.353,
    "s": 75.369,
    "l": 39.804
  },
  "oklch": {
    "l": 0.49385,
    "c": 0.18264,
    "h": 28.6
  },
  "luminance": 0.10515
}

Semantic roles & 50–950 ramp

primary

#B21F19

secondary

#5BC8CC

accent

#EBF236

background

#FEF6F5

surface

#FDECE9

border

#D5C7C5

text

#160703

muted

#847A78

Preview Lab

Preview with #B21F19

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

Preview Lab → · Contrast checker → · Palette generator →