#373DBA#373DBA

#373DBA is a dark, vivid blue. Relative luminance 0.077; OKLCH L 44.1% C 0.192 H 273.2°. Best body text is #FFFFFF at 8.27:1 contrast (WCAG AA passes).

Color values

HEX	#373DBA
RGB	rgb(55, 61, 186)
HSL	hsl(237, 54%, 47%)
HSV	hsv(237, 70%, 73%)
CMYK	cmyk(70.4%, 67.2%, 0%, 27.1%)
CIE-LAB	lab(33.34, 38.90, -66.40)
CIE-LCH	lch(33.34, 76.95, 300.36°)
OKLab	oklab(44.13% 0.0109 -0.1919)
OKLCH	oklch(44.13% 0.192 273.2)
XYZ	xyz(12.1043, 7.6937, 47.2920)
Luminance	0.0770 (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

#373DBA #BAB437

analogous

#377FBA #373DBA #7337BA

triadic

#373DBA #BA373D #3DBA37

tetradic

#373DBA #BA377F #BAB437 #37BA73

square

#373DBA #BA377F #BAB437 #37BA73

split-complementary

#373DBA #BA7337 #7FBA37

monochromatic

#1B1E5C #292E8B #373DBA #5F64D0 #8E92DE

Accessibility & contrast

On white

8.27

#373DBA on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.54

#373DBA on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #373DBA

8.27:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##373DBA	#FFFFFF	#000000	##FFFFFF
##373DBA	1.00	8.27	2.54	8.27
#FFFFFF	8.27	1.00	21.00	1.00
#000000	2.54	21.00	1.00	21.00
##FFFFFF	8.27	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0055BE

Deuteranopia (green-blind)

#0048B8

Tritanopia (blue-blind)

#005E76

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #373dba;
/* rgb */ color: rgb(55, 61, 186);
/* oklch */ color: oklch(44.1% 0.192 273.2);

Tailwind

colors: {
  custom: {
    50: '#8073d0',
    500: '#373dba',
    950: '#000000',
  },
}

SCSS

$custom: #373dba;
$custom-light: #8073d0;
$custom-dark: #000000;

JSON

{
  "hex": "#373dba",
  "rgb": {
    "r": 55,
    "g": 61,
    "b": 186
  },
  "hsl": {
    "h": 237.252,
    "s": 54.357,
    "l": 47.255
  },
  "oklch": {
    "l": 0.4413,
    "c": 0.19219,
    "h": 273.2
  },
  "luminance": 0.07695
}

Semantic roles & 50–950 ramp

primary

#373DBA

secondary

#C8C585

accent

#D74ADE

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0C0814

muted

#7D7B82

Preview Lab

Preview with #373DBA

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

Preview Lab → · Contrast checker → · Palette generator →