#373BB2#373BB2

#373BB2 is a dark, vivid blue. Relative luminance 0.072; OKLCH L 43.0% C 0.184 H 274.1°. Best body text is #FFFFFF at 8.64:1 contrast (WCAG AA passes).

Color values

HEX	#373BB2
RGB	rgb(55, 59, 178)
HSL	hsl(238, 53%, 46%)
HSV	hsv(238, 69%, 70%)
CMYK	cmyk(69.1%, 66.9%, 0%, 30.2%)
CIE-LAB	lab(32.15, 37.37, -63.60)
CIE-LCH	lch(32.15, 73.77, 300.44°)
OKLab	oklab(43.05% 0.013 -0.1837)
OKLCH	oklch(43.05% 0.184 274.1)
XYZ	xyz(11.1727, 7.1535, 42.9028)
Luminance	0.0716 (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

#373BB2 #B2AE37

analogous

#3778B2 #373BB2 #7037B2

triadic

#373BB2 #B2373B #3BB237

tetradic

#373BB2 #B23778 #B2AE37 #37B270

square

#373BB2 #B23778 #B2AE37 #37B270

split-complementary

#373BB2 #B27037 #78B237

monochromatic

#1A1C54 #292C83 #373BB2 #5A5ECC #898CDB

Accessibility & contrast

On white

8.64

#373BB2 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.43

#373BB2 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #373BB2

8.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##373BB2	#FFFFFF	#000000	##FFFFFF
##373BB2	1.00	8.64	2.43	8.64
#FFFFFF	8.64	1.00	21.00	1.00
#000000	2.43	21.00	1.00	21.00
##FFFFFF	8.64	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0051B6

Deuteranopia (green-blind)

#0046B0

Tritanopia (blue-blind)

#005B71

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #373bb2;
/* rgb */ color: rgb(55, 59, 178);
/* oklch */ color: oklch(43.0% 0.184 274.1);

Tailwind

colors: {
  custom: {
    50: '#7e71ca',
    500: '#373bb2',
    950: '#000000',
  },
}

SCSS

$custom: #373bb2;
$custom-light: #7e71ca;
$custom-dark: #000000;

JSON

{
  "hex": "#373bb2",
  "rgb": {
    "r": 55,
    "g": 59,
    "b": 178
  },
  "hsl": {
    "h": 238.049,
    "s": 52.79,
    "l": 45.686
  },
  "oklch": {
    "l": 0.4305,
    "c": 0.18415,
    "h": 274.1
  },
  "luminance": 0.07155
}

Semantic roles & 50–950 ramp

primary

#373BB2

secondary

#C5C280

accent

#D84CDC

background

#F8F6FC

surface

#EFECF9

border

#CAC7D2

text

#0B0813

muted

#7C7B82

Preview Lab

Preview with #373BB2

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

Preview Lab → · Contrast checker → · Palette generator →