#373DB9#373DB9

#373DB9 is a dark, vivid blue. Relative luminance 0.077; OKLCH L 44.0% C 0.191 H 273.3°. Best body text is #FFFFFF at 8.30:1 contrast (WCAG AA passes).

Color values

HEX	#373DB9
RGB	rgb(55, 61, 185)
HSL	hsl(237, 54%, 47%)
HSV	hsv(237, 70%, 73%)
CMYK	cmyk(70.3%, 67%, 0%, 27.5%)
CIE-LAB	lab(33.25, 38.55, -65.96)
CIE-LCH	lch(33.25, 76.40, 300.31°)
OKLab	oklab(44.04% 0.011 -0.1906)
OKLCH	oklch(44.04% 0.191 273.3)
XYZ	xyz(11.9983, 7.6513, 46.7341)
Luminance	0.0765 (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

#373DB9 #B9B337

analogous

#377EB9 #373DB9 #7237B9

triadic

#373DB9 #B9373D #3DB937

tetradic

#373DB9 #B9377E #B9B337 #37B972

square

#373DB9 #B9377E #B9B337 #37B972

split-complementary

#373DB9 #B97237 #7EB937

monochromatic

#1B1E5B #292D8A #373DB9 #5E63CF #8D91DD

Accessibility & contrast

On white

8.30

#373DB9 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.53

#373DB9 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #373DB9

8.30:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##373DB9	#FFFFFF	#000000	##FFFFFF
##373DB9	1.00	8.30	2.53	8.30
#FFFFFF	8.30	1.00	21.00	1.00
#000000	2.53	21.00	1.00	21.00
##FFFFFF	8.30	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0054BD

Deuteranopia (green-blind)

#0048B7

Tritanopia (blue-blind)

#005E76

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #373db9;
/* rgb */ color: rgb(55, 61, 185);
/* oklch */ color: oklch(44.0% 0.191 273.3);

Tailwind

colors: {
  custom: {
    50: '#8073cf',
    500: '#373db9',
    950: '#000000',
  },
}

SCSS

$custom: #373db9;
$custom-light: #8073cf;
$custom-dark: #000000;

JSON

{
  "hex": "#373db9",
  "rgb": {
    "r": 55,
    "g": 61,
    "b": 185
  },
  "hsl": {
    "h": 237.231,
    "s": 54.167,
    "l": 47.059
  },
  "oklch": {
    "l": 0.44037,
    "c": 0.19091,
    "h": 273.3
  },
  "luminance": 0.07652
}

Semantic roles & 50–950 ramp

primary

#373DB9

secondary

#C8C584

accent

#D74ADE

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0C0814

muted

#7D7B82

Preview Lab

Preview with #373DB9

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

Preview Lab → · Contrast checker → · Palette generator →