#373FBA#373FBA

#373FBA is a dark, vivid blue. Relative luminance 0.079; OKLCH L 44.5% C 0.190 H 272.9°. Best body text is #FFFFFF at 8.13:1 contrast (WCAG AA passes).

Color values

HEX	#373FBA
RGB	rgb(55, 63, 186)
HSL	hsl(236, 54%, 47%)
HSV	hsv(236, 70%, 73%)
CMYK	cmyk(70.4%, 66.1%, 0%, 27.1%)
CIE-LAB	lab(33.80, 37.66, -65.64)
CIE-LCH	lch(33.80, 75.68, 299.85°)
OKLab	oklab(44.47% 0.0095 -0.1897)
OKLCH	oklch(44.47% 0.19 272.9)
XYZ	xyz(12.2130, 7.9112, 47.3282)
Luminance	0.0791 (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

#373FBA #BAB237

analogous

#3781BA #373FBA #7137BA

triadic

#373FBA #BA373F #3FBA37

tetradic

#373FBA #BA3781 #BAB237 #37BA71

square

#373FBA #BA3781 #BAB237 #37BA71

split-complementary

#373FBA #BA7137 #81BA37

monochromatic

#1B1F5C #292F8B #373FBA #5F66D0 #8E93DE

Accessibility & contrast

On white

8.13

#373FBA on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.58

#373FBA on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #373FBA

8.13:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##373FBA	#FFFFFF	#000000	##FFFFFF
##373FBA	1.00	8.13	2.58	8.13
#FFFFFF	8.13	1.00	21.00	1.00
#000000	2.58	21.00	1.00	21.00
##FFFFFF	8.13	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0056BE

Deuteranopia (green-blind)

#0049B8

Tritanopia (blue-blind)

#006077

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #373fba;
/* rgb */ color: rgb(55, 63, 186);
/* oklch */ color: oklch(44.5% 0.190 272.9);

Tailwind

colors: {
  custom: {
    50: '#8074d0',
    500: '#373fba',
    950: '#000000',
  },
}

SCSS

$custom: #373fba;
$custom-light: #8074d0;
$custom-dark: #000000;

JSON

{
  "hex": "#373fba",
  "rgb": {
    "r": 55,
    "g": 63,
    "b": 186
  },
  "hsl": {
    "h": 236.336,
    "s": 54.357,
    "l": 47.255
  },
  "oklch": {
    "l": 0.44465,
    "c": 0.1899,
    "h": 272.9
  },
  "luminance": 0.07912
}

Semantic roles & 50–950 ramp

primary

#373FBA

secondary

#C8C485

accent

#D54ADE

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0C0814

muted

#7D7B82

Preview Lab

Preview with #373FBA

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

Preview Lab → · Contrast checker → · Palette generator →