#B31B3E#B31B3E

#B31B3E is a mid, vivid red. Relative luminance 0.107; OKLCH L 49.8% C 0.184 H 15.7°. Best body text is #FFFFFF at 6.68:1 contrast (WCAG AA passes).

Color values

HEX	#B31B3E
RGB	rgb(179, 27, 62)
HSL	hsl(346, 74%, 40%)
HSV	hsv(346, 85%, 70%)
CMYK	cmyk(0%, 84.9%, 65.4%, 29.8%)
CIE-LAB	lab(39.10, 59.16, 20.72)
CIE-LCH	lch(39.10, 62.68, 19.30°)
OKLab	oklab(49.83% 0.1768 0.0496)
OKLCH	oklch(49.83% 0.184 15.7)
XYZ	xyz(19.8541, 10.7185, 5.5800)
Luminance	0.1071 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B31B3E #1BB390

analogous

#B31B8A #B31B3E #B3441B

triadic

#B31B3E #3EB31B #1B3EB3

tetradic

#B31B3E #8AB31B #1BB390 #441BB3

square

#B31B3E #8AB31B #1BB390 #441BB3

split-complementary

#B31B3E #1BB344 #1B8AB3

monochromatic

#490B19 #7E132C #B31B3E #DF2C55 #E76180

Accessibility & contrast

On white

6.68

#B31B3E on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.14

#B31B3E on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B31B3E

6.68:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B31B3E	#FFFFFF	#000000	##FFFFFF
##B31B3E	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)

#4B483E

Deuteranopia (green-blind)

#71673A

Tritanopia (blue-blind)

#C5002B

Achromatopsia (no color)

#5C5C5C

Design tokens & code

CSS

--color: #b31b3e;
/* rgb */ color: rgb(179, 27, 62);
/* oklch */ color: oklch(49.8% 0.184 15.7);

Tailwind

colors: {
  custom: {
    50: '#d26a73',
    500: '#b31b3e',
    950: '#000000',
  },
}

SCSS

$custom: #b31b3e;
$custom-light: #d26a73;
$custom-dark: #000000;

JSON

{
  "hex": "#b31b3e",
  "rgb": {
    "r": 179,
    "g": 27,
    "b": 62
  },
  "hsl": {
    "h": 346.184,
    "s": 73.786,
    "l": 40.392
  },
  "oklch": {
    "l": 0.49829,
    "c": 0.18366,
    "h": 15.7
  },
  "luminance": 0.10715
}

Semantic roles & 50–950 ramp

primary

#B31B3E

secondary

#5ECCB2

accent

#F0C637

background

#FEF6F6

surface

#FCECEC

border

#D5C7C7

text

#160808

muted

#847A7B

Preview Lab

Preview with #B31B3E

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

Preview Lab → · Contrast checker → · Palette generator →