#373CA0#373CA0

#373CA0 is a dark, vivid blue. Relative luminance 0.066; OKLCH L 41.6% C 0.159 H 274.9°. Best body text is #FFFFFF at 9.07:1 contrast (WCAG AA passes).

Color values

HEX	#373CA0
RGB	rgb(55, 60, 160)
HSL	hsl(237, 49%, 42%)
HSV	hsv(237, 66%, 63%)
CMYK	cmyk(65.6%, 62.5%, 0%, 37.3%)
CIE-LAB	lab(30.83, 30.45, -54.96)
CIE-LCH	lch(30.83, 62.84, 298.99°)
OKLab	oklab(41.6% 0.0136 -0.1584)
OKLCH	oklch(41.6% 0.159 274.9)
XYZ	xyz(9.5345, 6.5812, 34.0187)
Luminance	0.0658 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#373CA0 #A09B37

analogous

#3771A0 #373CA0 #6737A0

triadic

#373CA0 #A0373C #3CA037

tetradic

#373CA0 #A03771 #A09B37 #37A067

square

#373CA0 #A03771 #A09B37 #37A067

split-complementary

#373CA0 #A06737 #71A037

monochromatic

#181A45 #272B72 #373CA0 #5156C3 #7F83D3

Accessibility & contrast

On white

9.07

#373CA0 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.32

#373CA0 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #373CA0

9.07:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##373CA0	#FFFFFF	#000000	##FFFFFF
##373CA0	1.00	9.07	2.32	9.07
#FFFFFF	9.07	1.00	21.00	1.00
#000000	2.32	21.00	1.00	21.00
##FFFFFF	9.07	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004DA3

Deuteranopia (green-blind)

#00449E

Tritanopia (blue-blind)

#005568

Achromatopsia (no color)

#494949

Design tokens & code

CSS

--color: #373ca0;
/* rgb */ color: rgb(55, 60, 160);
/* oklch */ color: oklch(41.6% 0.159 274.9);

Tailwind

colors: {
  custom: {
    50: '#7a72bd',
    500: '#373ca0',
    950: '#000000',
  },
}

SCSS

$custom: #373ca0;
$custom-light: #7a72bd;
$custom-dark: #000000;

JSON

{
  "hex": "#373ca0",
  "rgb": {
    "r": 55,
    "g": 60,
    "b": 160
  },
  "hsl": {
    "h": 237.143,
    "s": 48.837,
    "l": 42.157
  },
  "oklch": {
    "l": 0.41603,
    "c": 0.15894,
    "h": 274.9
  },
  "luminance": 0.06582
}

Semantic roles & 50–950 ramp

primary

#373CA0

secondary

#BCB977

accent

#D24FD8

background

#F7F6FB

surface

#EEECF7

border

#C9C7D0

text

#0A0812

muted

#7C7B81

Preview Lab

Preview with #373CA0

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

Preview Lab → · Contrast checker → · Palette generator →