#373BB3#373BB3

#373BB3 is a dark, vivid blue. Relative luminance 0.072; OKLCH L 43.1% C 0.185 H 274.0°. Best body text is #FFFFFF at 8.61:1 contrast (WCAG AA passes).

Color values

HEX	#373BB3
RGB	rgb(55, 59, 179)
HSL	hsl(238, 53%, 46%)
HSV	hsv(238, 69%, 70%)
CMYK	cmyk(69.3%, 67%, 0%, 29.8%)
CIE-LAB	lab(32.24, 37.72, -64.05)
CIE-LCH	lch(32.24, 74.33, 300.49°)
OKLab	oklab(43.14% 0.0129 -0.185)
OKLCH	oklch(43.14% 0.185 274)
XYZ	xyz(11.2735, 7.1938, 43.4335)
Luminance	0.0720 (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

#373BB3 #B3AF37

analogous

#3779B3 #373BB3 #7137B3

triadic

#373BB3 #B3373B #3BB337

tetradic

#373BB3 #B33779 #B3AF37 #37B371

square

#373BB3 #B33779 #B3AF37 #37B371

split-complementary

#373BB3 #B37137 #79B337

monochromatic

#1A1C55 #292C84 #373BB3 #5B5ECD #8A8CDB

Accessibility & contrast

On white

8.61

#373BB3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.44

#373BB3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #373BB3

8.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##373BB3	#FFFFFF	#000000	##FFFFFF
##373BB3	1.00	8.61	2.44	8.61
#FFFFFF	8.61	1.00	21.00	1.00
#000000	2.44	21.00	1.00	21.00
##FFFFFF	8.61	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0052B7

Deuteranopia (green-blind)

#0046B1

Tritanopia (blue-blind)

#005B72

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #373bb3;
/* rgb */ color: rgb(55, 59, 179);
/* oklch */ color: oklch(43.1% 0.185 274.0);

Tailwind

colors: {
  custom: {
    50: '#7f71cb',
    500: '#373bb3',
    950: '#000000',
  },
}

SCSS

$custom: #373bb3;
$custom-light: #7f71cb;
$custom-dark: #000000;

JSON

{
  "hex": "#373bb3",
  "rgb": {
    "r": 55,
    "g": 59,
    "b": 179
  },
  "hsl": {
    "h": 238.065,
    "s": 52.991,
    "l": 45.882
  },
  "oklch": {
    "l": 0.43143,
    "c": 0.18545,
    "h": 274
  },
  "luminance": 0.07195
}

Semantic roles & 50–950 ramp

primary

#373BB3

secondary

#C5C381

accent

#D84BDC

background

#F8F6FC

surface

#EFECF9

border

#CAC7D2

text

#0B0813

muted

#7C7B82

Preview Lab

Preview with #373BB3

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

Preview Lab → · Contrast checker → · Palette generator →