#373DB7#373DB7

#373DB7 is a dark, vivid blue. Relative luminance 0.076; OKLCH L 43.9% C 0.188 H 273.4°. Best body text is #FFFFFF at 8.35:1 contrast (WCAG AA passes).

Color values

HEX	#373DB7
RGB	rgb(55, 61, 183)
HSL	hsl(237, 54%, 47%)
HSV	hsv(237, 70%, 72%)
CMYK	cmyk(69.9%, 66.7%, 0%, 28.2%)
CIE-LAB	lab(33.07, 37.86, -65.07)
CIE-LCH	lch(33.07, 75.29, 300.19°)
OKLab	oklab(43.85% 0.0112 -0.188)
OKLCH	oklch(43.85% 0.188 273.4)
XYZ	xyz(11.7887, 7.5675, 45.6300)
Luminance	0.0757 (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

#373DB7 #B7B137

analogous

#377DB7 #373DB7 #7137B7

triadic

#373DB7 #B7373D #3DB737

tetradic

#373DB7 #B7377D #B7B137 #37B771

square

#373DB7 #B7377D #B7B137 #37B771

split-complementary

#373DB7 #B77137 #7DB737

monochromatic

#1B1E59 #292D88 #373DB7 #5D62CE #8C90DC

Accessibility & contrast

On white

8.35

#373DB7 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.51

#373DB7 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #373DB7

8.35:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##373DB7	#FFFFFF	#000000	##FFFFFF
##373DB7	1.00	8.35	2.51	8.35
#FFFFFF	8.35	1.00	21.00	1.00
#000000	2.51	21.00	1.00	21.00
##FFFFFF	8.35	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0054BB

Deuteranopia (green-blind)

#0048B5

Tritanopia (blue-blind)

#005D75

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #373db7;
/* rgb */ color: rgb(55, 61, 183);
/* oklch */ color: oklch(43.9% 0.188 273.4);

Tailwind

colors: {
  custom: {
    50: '#7f73ce',
    500: '#373db7',
    950: '#000000',
  },
}

SCSS

$custom: #373db7;
$custom-light: #7f73ce;
$custom-dark: #000000;

JSON

{
  "hex": "#373db7",
  "rgb": {
    "r": 55,
    "g": 61,
    "b": 183
  },
  "hsl": {
    "h": 237.188,
    "s": 53.782,
    "l": 46.667
  },
  "oklch": {
    "l": 0.4385,
    "c": 0.18832,
    "h": 273.4
  },
  "luminance": 0.07569
}

Semantic roles & 50–950 ramp

primary

#373DB7

secondary

#C7C483

accent

#D64BDD

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0C0814

muted

#7D7B82

Preview Lab

Preview with #373DB7

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

Preview Lab → · Contrast checker → · Palette generator →