#373CB9#373CB9

#373CB9 is a dark, vivid blue. Relative luminance 0.075; OKLCH L 43.9% C 0.192 H 273.5°. Best body text is #FFFFFF at 8.37:1 contrast (WCAG AA passes).

Color values

HEX	#373CB9
RGB	rgb(55, 60, 185)
HSL	hsl(238, 54%, 47%)
HSV	hsv(238, 70%, 73%)
CMYK	cmyk(70.3%, 67.6%, 0%, 27.5%)
CIE-LAB	lab(33.02, 39.17, -66.33)
CIE-LCH	lch(33.02, 77.03, 300.56°)
OKLab	oklab(43.87% 0.0116 -0.1917)
OKLCH	oklch(43.87% 0.192 273.5)
XYZ	xyz(11.9454, 7.5456, 46.7164)
Luminance	0.0755 (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

#373CB9 #B9B437

analogous

#377DB9 #373CB9 #7337B9

triadic

#373CB9 #B9373C #3CB937

tetradic

#373CB9 #B9377D #B9B437 #37B973

square

#373CB9 #B9377D #B9B437 #37B973

split-complementary

#373CB9 #B97337 #7DB937

monochromatic

#1B1D5B #292D8A #373CB9 #5E62CF #8D90DD

Accessibility & contrast

On white

8.37

#373CB9 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.51

#373CB9 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #373CB9

8.37:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##373CB9	#FFFFFF	#000000	##FFFFFF
##373CB9	1.00	8.37	2.51	8.37
#FFFFFF	8.37	1.00	21.00	1.00
#000000	2.51	21.00	1.00	21.00
##FFFFFF	8.37	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0054BD

Deuteranopia (green-blind)

#0048B7

Tritanopia (blue-blind)

#005D75

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #373cb9;
/* rgb */ color: rgb(55, 60, 185);
/* oklch */ color: oklch(43.9% 0.192 273.5);

Tailwind

colors: {
  custom: {
    50: '#8072cf',
    500: '#373cb9',
    950: '#000000',
  },
}

SCSS

$custom: #373cb9;
$custom-light: #8072cf;
$custom-dark: #000000;

JSON

{
  "hex": "#373cb9",
  "rgb": {
    "r": 55,
    "g": 60,
    "b": 185
  },
  "hsl": {
    "h": 237.692,
    "s": 54.167,
    "l": 47.059
  },
  "oklch": {
    "l": 0.43871,
    "c": 0.19203,
    "h": 273.5
  },
  "luminance": 0.07547
}

Semantic roles & 50–950 ramp

primary

#373CB9

secondary

#C8C584

accent

#D84ADE

background

#F8F6FC

surface

#F0ECF9

border

#CBC7D2

text

#0C0814

muted

#7D7B82

Preview Lab

Preview with #373CB9

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

Preview Lab → · Contrast checker → · Palette generator →