#B03728#B03728

#B03728 is a mid, vivid red. Relative luminance 0.121; OKLCH L 51.3% C 0.160 H 30.4°. Best body text is #FFFFFF at 6.13:1 contrast (WCAG AA passes).

Color values

HEX	#B03728
RGB	rgb(176, 55, 40)
HSL	hsl(7, 63%, 42%)
HSV	hsv(7, 77%, 69%)
CMYK	cmyk(0%, 68.8%, 77.3%, 31%)
CIE-LAB	lab(41.40, 48.25, 36.55)
CIE-LCH	lch(41.40, 60.53, 37.14°)
OKLab	oklab(51.33% 0.1378 0.0807)
OKLCH	oklch(51.33% 0.16 30.4)
XYZ	xyz(19.6559, 12.1186, 3.3112)
Luminance	0.1212 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B03728 #28A1B0

analogous

#B0285D #B03728 #B07B28

triadic

#B03728 #28B037 #3728B0

tetradic

#B03728 #5DB028 #28A1B0 #7B28B0

square

#B03728 #5DB028 #28A1B0 #7B28B0

split-complementary

#B03728 #28B07B #285DB0

monochromatic

#4C1811 #7E271D #B03728 #D45141 #DF7F73

Accessibility & contrast

On white

6.13

#B03728 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.42

#B03728 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B03728

6.13:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B03728	#FFFFFF	#000000	##FFFFFF
##B03728	1.00	6.13	3.42	6.13
#FFFFFF	6.13	1.00	21.00	1.00
#000000	3.42	21.00	1.00	21.00
##FFFFFF	6.13	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5A5125

Deuteranopia (green-blind)

#786B23

Tritanopia (blue-blind)

#C20F34

Achromatopsia (no color)

#626262

Design tokens & code

CSS

--color: #b03728;
/* rgb */ color: rgb(176, 55, 40);
/* oklch */ color: oklch(51.3% 0.160 30.4);

Tailwind

colors: {
  custom: {
    50: '#d07563',
    500: '#b03728',
    950: '#000000',
  },
}

SCSS

$custom: #b03728;
$custom-light: #d07563;
$custom-dark: #000000;

JSON

{
  "hex": "#b03728",
  "rgb": {
    "r": 176,
    "g": 55,
    "b": 40
  },
  "hsl": {
    "h": 6.618,
    "s": 62.963,
    "l": 42.353
  },
  "oklch": {
    "l": 0.51332,
    "c": 0.15966,
    "h": 30.4
  },
  "luminance": 0.12116
}

Semantic roles & 50–950 ramp

primary

#B03728

secondary

#6DBDC6

accent

#D4E642

background

#FDF7F5

surface

#FBEDEA

border

#D4C8C6

text

#150905

muted

#837B79

Preview Lab

Preview with #B03728

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

Preview Lab → · Contrast checker → · Palette generator →