#373FB2#373FB2

#373FB2 is a dark, vivid blue. Relative luminance 0.076; OKLCH L 43.7% C 0.179 H 273.2°. Best body text is #FFFFFF at 8.35:1 contrast (WCAG AA passes).

Color values

HEX	#373FB2
RGB	rgb(55, 63, 178)
HSL	hsl(236, 53%, 46%)
HSV	hsv(236, 69%, 70%)
CMYK	cmyk(69.1%, 64.6%, 0%, 30.2%)
CIE-LAB	lab(33.09, 34.87, -62.06)
CIE-LCH	lch(33.09, 71.19, 299.33°)
OKLab	oklab(43.74% 0.0102 -0.1792)
OKLCH	oklch(43.74% 0.179 273.2)
XYZ	xyz(11.3863, 7.5805, 42.9740)
Luminance	0.0758 (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

#373FB2 #B2AA37

analogous

#377CB2 #373FB2 #6D37B2

triadic

#373FB2 #B2373F #3FB237

tetradic

#373FB2 #B2377C #B2AA37 #37B26D

square

#373FB2 #B2377C #B2AA37 #37B26D

split-complementary

#373FB2 #B26D37 #7CB237

monochromatic

#1A1E54 #292E83 #373FB2 #5A62CC #898EDB

Accessibility & contrast

On white

8.35

#373FB2 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.52

#373FB2 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #373FB2

8.35:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##373FB2	#FFFFFF	#000000	##FFFFFF
##373FB2	1.00	8.35	2.52	8.35
#FFFFFF	8.35	1.00	21.00	1.00
#000000	2.52	21.00	1.00	21.00
##FFFFFF	8.35	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0054B6

Deuteranopia (green-blind)

#0048B0

Tritanopia (blue-blind)

#005D72

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #373fb2;
/* rgb */ color: rgb(55, 63, 178);
/* oklch */ color: oklch(43.7% 0.179 273.2);

Tailwind

colors: {
  custom: {
    50: '#7e74ca',
    500: '#373fb2',
    950: '#000000',
  },
}

SCSS

$custom: #373fb2;
$custom-light: #7e74ca;
$custom-dark: #000000;

JSON

{
  "hex": "#373fb2",
  "rgb": {
    "r": 55,
    "g": 63,
    "b": 178
  },
  "hsl": {
    "h": 236.098,
    "s": 52.79,
    "l": 45.686
  },
  "oklch": {
    "l": 0.43735,
    "c": 0.17945,
    "h": 273.2
  },
  "luminance": 0.07582
}

Semantic roles & 50–950 ramp

primary

#373FB2

secondary

#C5C080

accent

#D34CDC

background

#F8F7FC

surface

#EFEDF8

border

#CAC8D1

text

#0B0813

muted

#7C7B82

Preview Lab

Preview with #373FB2

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

Preview Lab → · Contrast checker → · Palette generator →