#B4183F#B4183F

#B4183F is a mid, vivid red. Relative luminance 0.107; OKLCH L 49.9% C 0.186 H 15.0°. Best body text is #FFFFFF at 6.68:1 contrast (WCAG AA passes).

Color values

HEX	#B4183F
RGB	rgb(180, 24, 63)
HSL	hsl(345, 76%, 40%)
HSV	hsv(345, 87%, 71%)
CMYK	cmyk(0%, 86.7%, 65%, 29.4%)
CIE-LAB	lab(39.10, 60.12, 20.12)
CIE-LCH	lch(39.10, 63.40, 18.50°)
OKLab	oklab(49.87% 0.18 0.0483)
OKLCH	oklch(49.87% 0.186 15)
XYZ	xyz(20.0485, 10.7186, 5.7149)
Luminance	0.1071 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B4183F #18B48D

analogous

#B4188D #B4183F #B43F18

triadic

#B4183F #3FB418 #183FB4

tetradic

#B4183F #8DB418 #18B48D #3F18B4

square

#B4183F #8DB418 #18B48D #3F18B4

split-complementary

#B4183F #18B43F #188DB4

monochromatic

#480A19 #7E112C #B4183F #E22756 #E95D80

Accessibility & contrast

On white

6.68

#B4183F on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.14

#B4183F on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B4183F

6.68:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B4183F	#FFFFFF	#000000	##FFFFFF
##B4183F	1.00	6.68	3.14	6.68
#FFFFFF	6.68	1.00	21.00	1.00
#000000	3.14	21.00	1.00	21.00
##FFFFFF	6.68	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4A483F

Deuteranopia (green-blind)

#71673B

Tritanopia (blue-blind)

#C6002A

Achromatopsia (no color)

#5C5C5C

Design tokens & code

CSS

--color: #b4183f;
/* rgb */ color: rgb(180, 24, 63);
/* oklch */ color: oklch(49.9% 0.186 15.0);

Tailwind

colors: {
  custom: {
    50: '#d36a73',
    500: '#b4183f',
    950: '#000000',
  },
}

SCSS

$custom: #b4183f;
$custom-light: #d36a73;
$custom-dark: #000000;

JSON

{
  "hex": "#b4183f",
  "rgb": {
    "r": 180,
    "g": 24,
    "b": 63
  },
  "hsl": {
    "h": 345,
    "s": 76.471,
    "l": 40
  },
  "oklch": {
    "l": 0.49871,
    "c": 0.18639,
    "h": 15
  },
  "luminance": 0.10715
}

Semantic roles & 50–950 ramp

primary

#B4183F

secondary

#5BCDB1

accent

#F3C335

background

#FEF6F6

surface

#FCECEC

border

#D5C7C7

text

#160808

muted

#847A7B

Preview Lab

Preview with #B4183F

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

Preview Lab → · Contrast checker → · Palette generator →