#373FB0#373FB0

#373FB0 is a dark, vivid blue. Relative luminance 0.075; OKLCH L 43.6% C 0.177 H 273.3°. Best body text is #FFFFFF at 8.40:1 contrast (WCAG AA passes).

Color values

HEX	#373FB0
RGB	rgb(55, 63, 176)
HSL	hsl(236, 52%, 45%)
HSV	hsv(236, 69%, 69%)
CMYK	cmyk(68.8%, 64.2%, 0%, 31%)
CIE-LAB	lab(32.92, 34.17, -61.15)
CIE-LCH	lch(32.92, 70.05, 299.19°)
OKLab	oklab(43.56% 0.0103 -0.1765)
OKLCH	oklch(43.56% 0.177 273.3)
XYZ	xyz(11.1869, 7.5008, 41.9241)
Luminance	0.0750 (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

#373FB0 #B0A837

analogous

#377BB0 #373FB0 #6B37B0

triadic

#373FB0 #B0373F #3FB037

tetradic

#373FB0 #B0377B #B0A837 #37B06B

square

#373FB0 #B0377B #B0A837 #37B06B

split-complementary

#373FB0 #B06B37 #7BB037

monochromatic

#1A1E53 #282E81 #373FB0 #5961CB #888DDA

Accessibility & contrast

On white

8.40

#373FB0 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.50

#373FB0 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #373FB0

8.40:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##373FB0	#FFFFFF	#000000	##FFFFFF
##373FB0	1.00	8.40	2.50	8.40
#FFFFFF	8.40	1.00	21.00	1.00
#000000	2.50	21.00	1.00	21.00
##FFFFFF	8.40	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0053B4

Deuteranopia (green-blind)

#0048AE

Tritanopia (blue-blind)

#005C71

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #373fb0;
/* rgb */ color: rgb(55, 63, 176);
/* oklch */ color: oklch(43.6% 0.177 273.3);

Tailwind

colors: {
  custom: {
    50: '#7e74c9',
    500: '#373fb0',
    950: '#000000',
  },
}

SCSS

$custom: #373fb0;
$custom-light: #7e74c9;
$custom-dark: #000000;

JSON

{
  "hex": "#373fb0",
  "rgb": {
    "r": 55,
    "g": 63,
    "b": 176
  },
  "hsl": {
    "h": 236.033,
    "s": 52.381,
    "l": 45.294
  },
  "oklch": {
    "l": 0.43555,
    "c": 0.17681,
    "h": 273.3
  },
  "luminance": 0.07502
}

Semantic roles & 50–950 ramp

primary

#373FB0

secondary

#C4BF7F

accent

#D24CDC

background

#F8F7FC

surface

#EFEDF8

border

#CAC8D1

text

#0B0813

muted

#7C7B82

Preview Lab

Preview with #373FB0

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

Preview Lab → · Contrast checker → · Palette generator →