#B73A30#B73A30

#B73A30 is a mid, vivid red. Relative luminance 0.133; OKLCH L 53.0% C 0.163 H 28.4°. Best body text is #FFFFFF at 5.74:1 contrast (WCAG AA passes).

Color values

HEX	#B73A30
RGB	rgb(183, 58, 48)
HSL	hsl(4, 58%, 45%)
HSV	hsv(4, 74%, 72%)
CMYK	cmyk(0%, 68.3%, 73.8%, 28.2%)
CIE-LAB	lab(43.23, 49.73, 34.39)
CIE-LCH	lch(43.23, 60.46, 34.66°)
OKLab	oklab(52.96% 0.1432 0.0775)
OKLCH	oklch(52.96% 0.163 28.4)
XYZ	xyz(21.5774, 13.3100, 4.2286)
Luminance	0.1331 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B73A30 #30ADB7

analogous

#B7306A #B73A30 #B77D30

triadic

#B73A30 #30B73A #3A30B7

tetradic

#B73A30 #6AB730 #30ADB7 #7D30B7

square

#B73A30 #6AB730 #30ADB7 #7D30B7

split-complementary

#B73A30 #30B77D #306AB7

monochromatic

#561B17 #872B23 #B73A30 #D25C52 #DE8A83

Accessibility & contrast

On white

5.74

#B73A30 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.66

#B73A30 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B73A30

5.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B73A30	#FFFFFF	#000000	##FFFFFF
##B73A30	1.00	5.74	3.66	5.74
#FFFFFF	5.74	1.00	21.00	1.00
#000000	3.66	21.00	1.00	21.00
##FFFFFF	5.74	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5D552E

Deuteranopia (green-blind)

#7D702C

Tritanopia (blue-blind)

#C91339

Achromatopsia (no color)

#666666

Design tokens & code

CSS

--color: #b73a30;
/* rgb */ color: rgb(183, 58, 48);
/* oklch */ color: oklch(53.0% 0.163 28.4);

Tailwind

colors: {
  custom: {
    50: '#d57769',
    500: '#b73a30',
    950: '#000000',
  },
}

SCSS

$custom: #b73a30;
$custom-light: #d57769;
$custom-dark: #000000;

JSON

{
  "hex": "#b73a30",
  "rgb": {
    "r": 183,
    "g": 58,
    "b": 48
  },
  "hsl": {
    "h": 4.444,
    "s": 58.442,
    "l": 45.294
  },
  "oklch": {
    "l": 0.52964,
    "c": 0.16287,
    "h": 28.4
  },
  "luminance": 0.13307
}

Semantic roles & 50–950 ramp

primary

#B73A30

secondary

#7BC2C8

accent

#D6E246

background

#FEF7F6

surface

#FCEEEB

border

#D5C9C6

text

#160906

muted

#847B7A

Preview Lab

Preview with #B73A30

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

Preview Lab → · Contrast checker → · Palette generator →