#B4313B#B4313B

#B4313B is a mid, vivid red. Relative luminance 0.122; OKLCH L 51.7% C 0.167 H 21.3°. Best body text is #FFFFFF at 6.10:1 contrast (WCAG AA passes).

Color values

HEX	#B4313B
RGB	rgb(180, 49, 59)
HSL	hsl(355, 57%, 45%)
HSV	hsv(355, 73%, 71%)
CMYK	cmyk(0%, 72.8%, 67.2%, 29.4%)
CIE-LAB	lab(41.56, 52.77, 25.74)
CIE-LCH	lch(41.56, 58.72, 26.00°)
OKLab	oklab(51.67% 0.1556 0.0606)
OKLCH	oklch(51.67% 0.167 21.3)
XYZ	xyz(20.7123, 12.2188, 5.4047)
Luminance	0.1222 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B4313B #31B4AA

analogous

#B4317C #B4313B #B46931

triadic

#B4313B #3BB431 #313BB4

tetradic

#B4313B #7CB431 #31B4AA #6931B4

square

#B4313B #7CB431 #31B4AA #6931B4

split-complementary

#B4313B #31B469 #317CB4

monochromatic

#54171B #84242B #B4313B #D0525C #DD8289

Accessibility & contrast

On white

6.10

#B4313B on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.44

#B4313B on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B4313B

6.10:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B4313B	#FFFFFF	#000000	##FFFFFF
##B4313B	1.00	6.10	3.44	6.10
#FFFFFF	6.10	1.00	21.00	1.00
#000000	3.44	21.00	1.00	21.00
##FFFFFF	6.10	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#56503A

Deuteranopia (green-blind)

#776C37

Tritanopia (blue-blind)

#C60036

Achromatopsia (no color)

#626262

Design tokens & code

CSS

--color: #b4313b;
/* rgb */ color: rgb(180, 49, 59);
/* oklch */ color: oklch(51.7% 0.167 21.3);

Tailwind

colors: {
  custom: {
    50: '#d27371',
    500: '#b4313b',
    950: '#000000',
  },
}

SCSS

$custom: #b4313b;
$custom-light: #d27371;
$custom-dark: #000000;

JSON

{
  "hex": "#b4313b",
  "rgb": {
    "r": 180,
    "g": 49,
    "b": 59
  },
  "hsl": {
    "h": 355.42,
    "s": 57.205,
    "l": 44.902
  },
  "oklch": {
    "l": 0.51669,
    "c": 0.16694,
    "h": 21.3
  },
  "luminance": 0.12216
}

Semantic roles & 50–950 ramp

primary

#B4313B

secondary

#7BC6C0

accent

#E0D547

background

#FDF7F6

surface

#FBEDEC

border

#D4C8C7

text

#150907

muted

#837B7A

Preview Lab

Preview with #B4313B

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

Preview Lab → · Contrast checker → · Palette generator →