#B4183D#B4183D

#B4183D is a mid, vivid red. Relative luminance 0.107; OKLCH L 49.8% C 0.186 H 15.9°. Best body text is #FFFFFF at 6.69:1 contrast (WCAG AA passes).

Color values

HEX	#B4183D
RGB	rgb(180, 24, 61)
HSL	hsl(346, 76%, 40%)
HSV	hsv(346, 87%, 71%)
CMYK	cmyk(0%, 86.7%, 66.1%, 29.4%)
CIE-LAB	lab(39.06, 60.01, 21.34)
CIE-LCH	lch(39.06, 63.70, 19.58°)
OKLab	oklab(49.83% 0.1792 0.0509)
OKLCH	oklch(49.83% 0.186 15.9)
XYZ	xyz(19.9936, 10.6967, 5.4259)
Luminance	0.1069 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B4183D #18B48F

analogous

#B4188B #B4183D #B44118

triadic

#B4183D #3DB418 #183DB4

tetradic

#B4183D #8BB418 #18B48F #4118B4

square

#B4183D #8BB418 #18B48F #4118B4

split-complementary

#B4183D #18B441 #188BB4

monochromatic

#480A18 #7E112B #B4183D #E22753 #E95D7E

Accessibility & contrast

On white

6.69

#B4183D on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.14

#B4183D on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B4183D

6.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B4183D	#FFFFFF	#000000	##FFFFFF
##B4183D	1.00	6.69	3.14	6.69
#FFFFFF	6.69	1.00	21.00	1.00
#000000	3.14	21.00	1.00	21.00
##FFFFFF	6.69	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4B483D

Deuteranopia (green-blind)

#716738

Tritanopia (blue-blind)

#C60029

Achromatopsia (no color)

#5C5C5C

Design tokens & code

CSS

--color: #b4183d;
/* rgb */ color: rgb(180, 24, 61);
/* oklch */ color: oklch(49.8% 0.186 15.9);

Tailwind

colors: {
  custom: {
    50: '#d36a72',
    500: '#b4183d',
    950: '#000000',
  },
}

SCSS

$custom: #b4183d;
$custom-light: #d36a72;
$custom-dark: #000000;

JSON

{
  "hex": "#b4183d",
  "rgb": {
    "r": 180,
    "g": 24,
    "b": 61
  },
  "hsl": {
    "h": 345.769,
    "s": 76.471,
    "l": 40
  },
  "oklch": {
    "l": 0.49831,
    "c": 0.18631,
    "h": 15.9
  },
  "luminance": 0.10693
}

Semantic roles & 50–950 ramp

primary

#B4183D

secondary

#5BCDB2

accent

#F3C635

background

#FEF6F6

surface

#FCECEC

border

#D5C7C7

text

#160707

muted

#847A7A

Preview Lab

Preview with #B4183D

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

Preview Lab → · Contrast checker → · Palette generator →