#B43728#B43728

#B43728 is a mid, vivid red. Relative luminance 0.126; OKLCH L 52.0% C 0.164 H 30.3°. Best body text is #FFFFFF at 5.97:1 contrast (WCAG AA passes).

Color values

HEX	#B43728
RGB	rgb(180, 55, 40)
HSL	hsl(6, 64%, 43%)
HSV	hsv(6, 78%, 71%)
CMYK	cmyk(0%, 69.4%, 77.8%, 29.4%)
CIE-LAB	lab(42.14, 49.60, 37.55)
CIE-LCH	lch(42.14, 62.21, 37.13°)
OKLab	oklab(52.02% 0.1415 0.0826)
OKLCH	oklch(52.02% 0.164 30.3)
XYZ	xyz(20.5739, 12.5920, 3.3542)
Luminance	0.1259 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B43728 #28A5B4

analogous

#B4285F #B43728 #B47D28

triadic

#B43728 #28B437 #3728B4

tetradic

#B43728 #5FB428 #28A5B4 #7D28B4

square

#B43728 #5FB428 #28A5B4 #7D28B4

split-complementary

#B43728 #28B47D #285FB4

monochromatic

#501812 #82281D #B43728 #D55344 #E18176

Accessibility & contrast

On white

5.97

#B43728 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.52

#B43728 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B43728

5.97:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B43728	#FFFFFF	#000000	##FFFFFF
##B43728	1.00	5.97	3.52	5.97
#FFFFFF	5.97	1.00	21.00	1.00
#000000	3.52	21.00	1.00	21.00
##FFFFFF	5.97	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5B5225

Deuteranopia (green-blind)

#7A6E23

Tritanopia (blue-blind)

#C60A35

Achromatopsia (no color)

#636363

Design tokens & code

CSS

--color: #b43728;
/* rgb */ color: rgb(180, 55, 40);
/* oklch */ color: oklch(52.0% 0.164 30.3);

Tailwind

colors: {
  custom: {
    50: '#d37563',
    500: '#b43728',
    950: '#000000',
  },
}

SCSS

$custom: #b43728;
$custom-light: #d37563;
$custom-dark: #000000;

JSON

{
  "hex": "#b43728",
  "rgb": {
    "r": 180,
    "g": 55,
    "b": 40
  },
  "hsl": {
    "h": 6.429,
    "s": 63.636,
    "l": 43.137
  },
  "oklch": {
    "l": 0.52021,
    "c": 0.16387,
    "h": 30.3
  },
  "luminance": 0.12589
}

Semantic roles & 50–950 ramp

primary

#B43728

secondary

#70BFC8

accent

#D5E741

background

#FEF7F5

surface

#FCEDEA

border

#D5C8C6

text

#160905

muted

#847B79

Preview Lab

Preview with #B43728

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

Preview Lab → · Contrast checker → · Palette generator →