#373FBC#373FBC

#373FBC is a dark, vivid blue. Relative luminance 0.080; OKLCH L 44.6% C 0.192 H 272.8°. Best body text is #FFFFFF at 8.08:1 contrast (WCAG AA passes).

Color values

HEX	#373FBC
RGB	rgb(55, 63, 188)
HSL	hsl(236, 55%, 48%)
HSV	hsv(236, 71%, 74%)
CMYK	cmyk(70.7%, 66.5%, 0%, 26.3%)
CIE-LAB	lab(33.98, 38.36, -66.53)
CIE-LCH	lch(33.98, 76.79, 299.97°)
OKLab	oklab(44.65% 0.0094 -0.1922)
OKLCH	oklch(44.65% 0.192 272.8)
XYZ	xyz(12.4271, 7.9969, 48.4558)
Luminance	0.0800 (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

#373FBC #BCB437

analogous

#3781BC #373FBC #7137BC

triadic

#373FBC #BC373F #3FBC37

tetradic

#373FBC #BC3781 #BCB437 #37BC71

square

#373FBC #BC3781 #BCB437 #37BC71

split-complementary

#373FBC #BC7137 #81BC37

monochromatic

#1B1F5D #292F8D #373FBC #6067D0 #8F94DE

Accessibility & contrast

On white

8.08

#373FBC on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.60

#373FBC on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #373FBC

8.08:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##373FBC	#FFFFFF	#000000	##FFFFFF
##373FBC	1.00	8.08	2.60	8.08
#FFFFFF	8.08	1.00	21.00	1.00
#000000	2.60	21.00	1.00	21.00
##FFFFFF	8.08	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0056C0

Deuteranopia (green-blind)

#004ABA

Tritanopia (blue-blind)

#006078

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #373fbc;
/* rgb */ color: rgb(55, 63, 188);
/* oklch */ color: oklch(44.6% 0.192 272.8);

Tailwind

colors: {
  custom: {
    50: '#8074d1',
    500: '#373fbc',
    950: '#000000',
  },
}

SCSS

$custom: #373fbc;
$custom-light: #8074d1;
$custom-dark: #000000;

JSON

{
  "hex": "#373fbc",
  "rgb": {
    "r": 55,
    "g": 63,
    "b": 188
  },
  "hsl": {
    "h": 236.391,
    "s": 54.733,
    "l": 47.647
  },
  "oklch": {
    "l": 0.4465,
    "c": 0.19248,
    "h": 272.8
  },
  "luminance": 0.07998
}

Semantic roles & 50–950 ramp

primary

#373FBC

secondary

#C9C586

accent

#D54ADE

background

#F8F7FD

surface

#F0EDFA

border

#CBC8D3

text

#0C0814

muted

#7D7B83

Preview Lab

Preview with #373FBC

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

Preview Lab → · Contrast checker → · Palette generator →