#B5403F#B5403F

#B5403F is a mid, vivid red. Relative luminance 0.138; OKLCH L 53.6% C 0.152 H 24.3°. Best body text is #FFFFFF at 5.57:1 contrast (WCAG AA passes).

Color values

HEX	#B5403F
RGB	rgb(181, 64, 63)
HSL	hsl(1, 48%, 48%)
HSV	hsv(1, 65%, 71%)
CMYK	cmyk(0%, 64.6%, 65.2%, 29%)
CIE-LAB	lab(44.02, 47.30, 26.42)
CIE-LCH	lch(44.02, 54.18, 29.19°)
OKLab	oklab(53.56% 0.1389 0.0626)
OKLCH	oklch(53.56% 0.152 24.3)
XYZ	xyz(21.7888, 13.8524, 6.2281)
Luminance	0.1385 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B5403F #3FB4B5

analogous

#B53F79 #B5403F #B57B3F

triadic

#B5403F #3FB540 #403FB5

tetradic

#B5403F #79B53F #3FB4B5 #7B3FB5

square

#B5403F #79B53F #3FB4B5 #7B3FB5

split-complementary

#B5403F #3FB57B #3F79B5

monochromatic

#5A201F #88302F #B5403F #CA6867 #DA9594

Accessibility & contrast

On white

5.57

#B5403F on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.77

#B5403F on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B5403F

5.57:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B5403F	#FFFFFF	#000000	##FFFFFF
##B5403F	1.00	5.57	3.77	5.57
#FFFFFF	5.57	1.00	21.00	1.00
#000000	3.77	21.00	1.00	21.00
##FFFFFF	5.57	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5F583E

Deuteranopia (green-blind)

#7C713C

Tritanopia (blue-blind)

#C62541

Achromatopsia (no color)

#686868

Design tokens & code

CSS

--color: #b5403f;
/* rgb */ color: rgb(181, 64, 63);
/* oklch */ color: oklch(53.6% 0.152 24.3);

Tailwind

colors: {
  custom: {
    50: '#d27b74',
    500: '#b5403f',
    950: '#000000',
  },
}

SCSS

$custom: #b5403f;
$custom-light: #d27b74;
$custom-dark: #000000;

JSON

{
  "hex": "#b5403f",
  "rgb": {
    "r": 181,
    "g": 64,
    "b": 63
  },
  "hsl": {
    "h": 0.508,
    "s": 48.361,
    "l": 47.843
  },
  "oklch": {
    "l": 0.53561,
    "c": 0.15234,
    "h": 24.3
  },
  "luminance": 0.13849
}

Semantic roles & 50–950 ramp

primary

#B5403F

secondary

#8AC5C5

accent

#D7D850

background

#FDF7F7

surface

#FBEEED

border

#D4C9C8

text

#150A08

muted

#837C7B

Preview Lab

Preview with #B5403F

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

Preview Lab → · Contrast checker → · Palette generator →