#373EB9#373EB9

#373EB9 is a dark, vivid blue. Relative luminance 0.078; OKLCH L 44.2% C 0.190 H 273.1°. Best body text is #FFFFFF at 8.23:1 contrast (WCAG AA passes).

Color values

HEX	#373EB9
RGB	rgb(55, 62, 185)
HSL	hsl(237, 54%, 47%)
HSV	hsv(237, 70%, 73%)
CMYK	cmyk(70.3%, 66.5%, 0%, 27.5%)
CIE-LAB	lab(33.48, 37.94, -65.58)
CIE-LCH	lch(33.48, 75.76, 300.05°)
OKLab	oklab(44.2% 0.0103 -0.1895)
OKLCH	oklch(44.2% 0.19 273.1)
XYZ	xyz(12.0522, 7.7591, 46.7520)
Luminance	0.0776 (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

#373EB9 #B9B237

analogous

#377FB9 #373EB9 #7137B9

triadic

#373EB9 #B9373E #3EB937

tetradic

#373EB9 #B9377F #B9B237 #37B971

square

#373EB9 #B9377F #B9B237 #37B971

split-complementary

#373EB9 #B97137 #7FB937

monochromatic

#1B1E5B #292E8A #373EB9 #5E64CF #8D92DD

Accessibility & contrast

On white

8.23

#373EB9 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.55

#373EB9 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #373EB9

8.23:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##373EB9	#FFFFFF	#000000	##FFFFFF
##373EB9	1.00	8.23	2.55	8.23
#FFFFFF	8.23	1.00	21.00	1.00
#000000	2.55	21.00	1.00	21.00
##FFFFFF	8.23	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0055BD

Deuteranopia (green-blind)

#0049B7

Tritanopia (blue-blind)

#005F76

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #373eb9;
/* rgb */ color: rgb(55, 62, 185);
/* oklch */ color: oklch(44.2% 0.190 273.1);

Tailwind

colors: {
  custom: {
    50: '#8074cf',
    500: '#373eb9',
    950: '#000000',
  },
}

SCSS

$custom: #373eb9;
$custom-light: #8074cf;
$custom-dark: #000000;

JSON

{
  "hex": "#373eb9",
  "rgb": {
    "r": 55,
    "g": 62,
    "b": 185
  },
  "hsl": {
    "h": 236.769,
    "s": 54.167,
    "l": 47.059
  },
  "oklch": {
    "l": 0.44204,
    "c": 0.18976,
    "h": 273.1
  },
  "luminance": 0.0776
}

Semantic roles & 50–950 ramp

primary

#373EB9

secondary

#C8C484

accent

#D64ADE

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0C0814

muted

#7D7B82

Preview Lab

Preview with #373EB9

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

Preview Lab → · Contrast checker → · Palette generator →