#B13728#B13728

#B13728 is a mid, vivid red. Relative luminance 0.122; OKLCH L 51.5% C 0.161 H 30.3°. Best body text is #FFFFFF at 6.09:1 contrast (WCAG AA passes).

Color values

HEX	#B13728
RGB	rgb(177, 55, 40)
HSL	hsl(7, 63%, 43%)
HSV	hsv(7, 77%, 69%)
CMYK	cmyk(0%, 68.9%, 77.4%, 30.6%)
CIE-LAB	lab(41.59, 48.59, 36.80)
CIE-LCH	lch(41.59, 60.95, 37.14°)
OKLab	oklab(51.51% 0.1387 0.0812)
OKLCH	oklch(51.51% 0.161 30.3)
XYZ	xyz(19.8829, 12.2357, 3.3218)
Luminance	0.1223 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B13728 #28A2B1

analogous

#B1285E #B13728 #B17B28

triadic

#B13728 #28B137 #3728B1

tetradic

#B13728 #5EB128 #28A2B1 #7B28B1

square

#B13728 #5EB128 #28A2B1 #7B28B1

split-complementary

#B13728 #28B17B #285EB1

monochromatic

#4D1811 #7F271D #B13728 #D45242 #E08074

Accessibility & contrast

On white

6.09

#B13728 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.45

#B13728 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B13728

6.09:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B13728	#FFFFFF	#000000	##FFFFFF
##B13728	1.00	6.09	3.45	6.09
#FFFFFF	6.09	1.00	21.00	1.00
#000000	3.45	21.00	1.00	21.00
##FFFFFF	6.09	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5A5125

Deuteranopia (green-blind)

#796C23

Tritanopia (blue-blind)

#C30E34

Achromatopsia (no color)

#626262

Design tokens & code

CSS

--color: #b13728;
/* rgb */ color: rgb(177, 55, 40);
/* oklch */ color: oklch(51.5% 0.161 30.3);

Tailwind

colors: {
  custom: {
    50: '#d17563',
    500: '#b13728',
    950: '#000000',
  },
}

SCSS

$custom: #b13728;
$custom-light: #d17563;
$custom-dark: #000000;

JSON

{
  "hex": "#b13728",
  "rgb": {
    "r": 177,
    "g": 55,
    "b": 40
  },
  "hsl": {
    "h": 6.569,
    "s": 63.134,
    "l": 42.549
  },
  "oklch": {
    "l": 0.51505,
    "c": 0.16071,
    "h": 30.3
  },
  "luminance": 0.12233
}

Semantic roles & 50–950 ramp

primary

#B13728

secondary

#6EBDC7

accent

#D4E642

background

#FEF7F5

surface

#FCEDEA

border

#D5C8C6

text

#160905

muted

#847B79

Preview Lab

Preview with #B13728

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

Preview Lab → · Contrast checker → · Palette generator →