#B4183C#B4183C

#B4183C is a mid, vivid red. Relative luminance 0.107; OKLCH L 49.8% C 0.186 H 16.3°. Best body text is #FFFFFF at 6.70:1 contrast (WCAG AA passes).

Color values

HEX	#B4183C
RGB	rgb(180, 24, 60)
HSL	hsl(346, 76%, 40%)
HSV	hsv(346, 87%, 71%)
CMYK	cmyk(0%, 86.7%, 66.7%, 29.4%)
CIE-LAB	lab(39.05, 59.96, 21.95)
CIE-LCH	lch(39.05, 63.85, 20.11°)
OKLab	oklab(49.81% 0.1788 0.0522)
OKLCH	oklch(49.81% 0.186 16.3)
XYZ	xyz(19.9669, 10.6860, 5.2854)
Luminance	0.1068 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B4183C #18B490

analogous

#B4188A #B4183C #B44218

triadic

#B4183C #3CB418 #183CB4

tetradic

#B4183C #8AB418 #18B490 #4218B4

square

#B4183C #8AB418 #18B490 #4218B4

split-complementary

#B4183C #18B442 #188AB4

monochromatic

#480A18 #7E112A #B4183C #E22752 #E95D7D

Accessibility & contrast

On white

6.70

#B4183C on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.14

#B4183C on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B4183C

6.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B4183C	#FFFFFF	#000000	##FFFFFF
##B4183C	1.00	6.70	3.14	6.70
#FFFFFF	6.70	1.00	21.00	1.00
#000000	3.14	21.00	1.00	21.00
##FFFFFF	6.70	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4B483C

Deuteranopia (green-blind)

#716737

Tritanopia (blue-blind)

#C60029

Achromatopsia (no color)

#5C5C5C

Design tokens & code

CSS

--color: #b4183c;
/* rgb */ color: rgb(180, 24, 60);
/* oklch */ color: oklch(49.8% 0.186 16.3);

Tailwind

colors: {
  custom: {
    50: '#d36a71',
    500: '#b4183c',
    950: '#000000',
  },
}

SCSS

$custom: #b4183c;
$custom-light: #d36a71;
$custom-dark: #000000;

JSON

{
  "hex": "#b4183c",
  "rgb": {
    "r": 180,
    "g": 24,
    "b": 60
  },
  "hsl": {
    "h": 346.154,
    "s": 76.471,
    "l": 40
  },
  "oklch": {
    "l": 0.49811,
    "c": 0.18629,
    "h": 16.3
  },
  "luminance": 0.10683
}

Semantic roles & 50–950 ramp

primary

#B4183C

secondary

#5BCDB3

accent

#F3C735

background

#FEF6F6

surface

#FCECEC

border

#D5C7C7

text

#160707

muted

#847A7A

Preview Lab

Preview with #B4183C

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

Preview Lab → · Contrast checker → · Palette generator →