#373BA4#373BA4

#373BA4 is a dark, vivid blue. Relative luminance 0.066; OKLCH L 41.8% C 0.166 H 274.9°. Best body text is #FFFFFF at 9.04:1 contrast (WCAG AA passes).

Color values

HEX	#373BA4
RGB	rgb(55, 59, 164)
HSL	hsl(238, 50%, 43%)
HSV	hsv(238, 66%, 64%)
CMYK	cmyk(66.5%, 64%, 0%, 35.7%)
CIE-LAB	lab(30.92, 32.50, -57.23)
CIE-LCH	lch(30.92, 65.81, 299.59°)
OKLab	oklab(41.78% 0.0142 -0.165)
OKLCH	oklch(41.78% 0.166 274.9)
XYZ	xyz(9.8381, 6.6196, 35.8740)
Luminance	0.0662 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 6.40

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#373BA4 #A4A037

analogous

#3771A4 #373BA4 #6937A4

triadic

#373BA4 #A4373B #3BA437

tetradic

#373BA4 #A43771 #A4A037 #37A469

square

#373BA4 #A43771 #A4A037 #37A469

split-complementary

#373BA4 #A46937 #71A437

monochromatic

#181A48 #282B76 #373BA4 #5357C5 #8184D5

Accessibility & contrast

On white

9.04

#373BA4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.32

#373BA4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #373BA4

9.04:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##373BA4	#FFFFFF	#000000	##FFFFFF
##373BA4	1.00	9.04	2.32	9.04
#FFFFFF	9.04	1.00	21.00	1.00
#000000	2.32	21.00	1.00	21.00
##FFFFFF	9.04	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004EA7

Deuteranopia (green-blind)

#0044A2

Tritanopia (blue-blind)

#00566A

Achromatopsia (no color)

#494949

Design tokens & code

CSS

--color: #373ba4;
/* rgb */ color: rgb(55, 59, 164);
/* oklch */ color: oklch(41.8% 0.166 274.9);

Tailwind

colors: {
  custom: {
    50: '#7b71c0',
    500: '#373ba4',
    950: '#000000',
  },
}

SCSS

$custom: #373ba4;
$custom-light: #7b71c0;
$custom-dark: #000000;

JSON

{
  "hex": "#373ba4",
  "rgb": {
    "r": 55,
    "g": 59,
    "b": 164
  },
  "hsl": {
    "h": 237.798,
    "s": 49.772,
    "l": 42.941
  },
  "oklch": {
    "l": 0.41775,
    "c": 0.16563,
    "h": 274.9
  },
  "luminance": 0.0662
}

Semantic roles & 50–950 ramp

primary

#373BA4

secondary

#BEBC79

accent

#D44FD9

background

#F8F6FB

surface

#EFECF7

border

#CAC7D0

text

#0B0712

muted

#7C7A81

Preview Lab

Preview with #373BA4

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

Preview Lab → · Contrast checker → · Palette generator →