#373CB8#373CB8

#373CB8 is a dark, vivid blue. Relative luminance 0.075; OKLCH L 43.8% C 0.191 H 273.5°. Best body text is #FFFFFF at 8.40:1 contrast (WCAG AA passes).

Color values

HEX	#373CB8
RGB	rgb(55, 60, 184)
HSL	hsl(238, 54%, 47%)
HSV	hsv(238, 70%, 72%)
CMYK	cmyk(70.1%, 67.4%, 0%, 27.8%)
CIE-LAB	lab(32.93, 38.82, -65.89)
CIE-LCH	lch(32.93, 76.48, 300.51°)
OKLab	oklab(43.78% 0.0117 -0.1904)
OKLCH	oklch(43.78% 0.191 273.5)
XYZ	xyz(11.8402, 7.5035, 46.1624)
Luminance	0.0751 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#373CB8 #B8B337

analogous

#377DB8 #373CB8 #7237B8

triadic

#373CB8 #B8373C #3CB837

tetradic

#373CB8 #B8377D #B8B337 #37B872

square

#373CB8 #B8377D #B8B337 #37B872

split-complementary

#373CB8 #B87237 #7DB837

monochromatic

#1B1D5A #292D89 #373CB8 #5D62CF #8D90DD

Accessibility & contrast

On white

8.40

#373CB8 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.50

#373CB8 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #373CB8

8.40:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##373CB8	#FFFFFF	#000000	##FFFFFF
##373CB8	1.00	8.40	2.50	8.40
#FFFFFF	8.40	1.00	21.00	1.00
#000000	2.50	21.00	1.00	21.00
##FFFFFF	8.40	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0053BC

Deuteranopia (green-blind)

#0047B6

Tritanopia (blue-blind)

#005D75

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #373cb8;
/* rgb */ color: rgb(55, 60, 184);
/* oklch */ color: oklch(43.8% 0.191 273.5);

Tailwind

colors: {
  custom: {
    50: '#8072ce',
    500: '#373cb8',
    950: '#000000',
  },
}

SCSS

$custom: #373cb8;
$custom-light: #8072ce;
$custom-dark: #000000;

JSON

{
  "hex": "#373cb8",
  "rgb": {
    "r": 55,
    "g": 60,
    "b": 184
  },
  "hsl": {
    "h": 237.674,
    "s": 53.975,
    "l": 46.863
  },
  "oklch": {
    "l": 0.43777,
    "c": 0.19075,
    "h": 273.5
  },
  "luminance": 0.07505
}

Semantic roles & 50–950 ramp

primary

#373CB8

secondary

#C7C584

accent

#D84ADD

background

#F8F6FC

surface

#F0ECF9

border

#CBC7D2

text

#0C0814

muted

#7D7B82

Preview Lab

Preview with #373CB8

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

Preview Lab → · Contrast checker → · Palette generator →