#373EB0#373EB0

#373EB0 is a dark, vivid blue. Relative luminance 0.074; OKLCH L 43.4% C 0.178 H 273.6°. Best body text is #FFFFFF at 8.47:1 contrast (WCAG AA passes).

Color values

HEX	#373EB0
RGB	rgb(55, 62, 176)
HSL	hsl(237, 52%, 45%)
HSV	hsv(237, 69%, 69%)
CMYK	cmyk(68.8%, 64.8%, 0%, 31%)
CIE-LAB	lab(32.68, 34.80, -61.55)
CIE-LCH	lch(32.68, 70.70, 299.49°)
OKLab	oklab(43.38% 0.0111 -0.1777)
OKLCH	oklch(43.38% 0.178 273.6)
XYZ	xyz(11.1320, 7.3910, 41.9058)
Luminance	0.0739 (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

#373EB0 #B0A937

analogous

#377AB0 #373EB0 #6C37B0

triadic

#373EB0 #B0373E #3EB037

tetradic

#373EB0 #B0377A #B0A937 #37B06C

square

#373EB0 #B0377A #B0A937 #37B06C

split-complementary

#373EB0 #B06C37 #7AB037

monochromatic

#1A1D53 #282E81 #373EB0 #5960CB #888CDA

Accessibility & contrast

On white

8.47

#373EB0 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.48

#373EB0 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #373EB0

8.47:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##373EB0	#FFFFFF	#000000	##FFFFFF
##373EB0	1.00	8.47	2.48	8.47
#FFFFFF	8.47	1.00	21.00	1.00
#000000	2.48	21.00	1.00	21.00
##FFFFFF	8.47	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0052B4

Deuteranopia (green-blind)

#0047AE

Tritanopia (blue-blind)

#005C71

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #373eb0;
/* rgb */ color: rgb(55, 62, 176);
/* oklch */ color: oklch(43.4% 0.178 273.6);

Tailwind

colors: {
  custom: {
    50: '#7e73c9',
    500: '#373eb0',
    950: '#000000',
  },
}

SCSS

$custom: #373eb0;
$custom-light: #7e73c9;
$custom-dark: #000000;

JSON

{
  "hex": "#373eb0",
  "rgb": {
    "r": 55,
    "g": 62,
    "b": 176
  },
  "hsl": {
    "h": 236.529,
    "s": 52.381,
    "l": 45.294
  },
  "oklch": {
    "l": 0.4338,
    "c": 0.178,
    "h": 273.6
  },
  "luminance": 0.07392
}

Semantic roles & 50–950 ramp

primary

#373EB0

secondary

#C4C07F

accent

#D34CDC

background

#F8F7FC

surface

#EFEDF8

border

#CAC8D1

text

#0B0813

muted

#7C7B82

Preview Lab

Preview with #373EB0

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

Preview Lab → · Contrast checker → · Palette generator →