#373EB7#373EB7

#373EB7 is a dark, vivid blue. Relative luminance 0.077; OKLCH L 44.0% C 0.187 H 273.2°. Best body text is #FFFFFF at 8.28:1 contrast (WCAG AA passes).

Color values

HEX	#373EB7
RGB	rgb(55, 62, 183)
HSL	hsl(237, 54%, 47%)
HSV	hsv(237, 70%, 72%)
CMYK	cmyk(69.9%, 66.1%, 0%, 28.2%)
CIE-LAB	lab(33.30, 37.24, -64.69)
CIE-LCH	lch(33.30, 74.65, 299.93°)
OKLab	oklab(44.02% 0.0105 -0.1869)
OKLCH	oklch(44.02% 0.187 273.2)
XYZ	xyz(11.8426, 7.6752, 45.6479)
Luminance	0.0768 (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

#373EB7 #B7B037

analogous

#377EB7 #373EB7 #7037B7

triadic

#373EB7 #B7373E #3EB737

tetradic

#373EB7 #B7377E #B7B037 #37B770

square

#373EB7 #B7377E #B7B037 #37B770

split-complementary

#373EB7 #B77037 #7EB737

monochromatic

#1B1E59 #292E88 #373EB7 #5D63CE #8C90DC

Accessibility & contrast

On white

8.28

#373EB7 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.54

#373EB7 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #373EB7

8.28:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##373EB7	#FFFFFF	#000000	##FFFFFF
##373EB7	1.00	8.28	2.54	8.28
#FFFFFF	8.28	1.00	21.00	1.00
#000000	2.54	21.00	1.00	21.00
##FFFFFF	8.28	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0054BB

Deuteranopia (green-blind)

#0048B5

Tritanopia (blue-blind)

#005E75

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #373eb7;
/* rgb */ color: rgb(55, 62, 183);
/* oklch */ color: oklch(44.0% 0.187 273.2);

Tailwind

colors: {
  custom: {
    50: '#7f73ce',
    500: '#373eb7',
    950: '#000000',
  },
}

SCSS

$custom: #373eb7;
$custom-light: #7f73ce;
$custom-dark: #000000;

JSON

{
  "hex": "#373eb7",
  "rgb": {
    "r": 55,
    "g": 62,
    "b": 183
  },
  "hsl": {
    "h": 236.719,
    "s": 53.782,
    "l": 46.667
  },
  "oklch": {
    "l": 0.44019,
    "c": 0.18717,
    "h": 273.2
  },
  "luminance": 0.07676
}

Semantic roles & 50–950 ramp

primary

#373EB7

secondary

#C7C383

accent

#D54BDD

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0B0814

muted

#7C7B82

Preview Lab

Preview with #373EB7

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

Preview Lab → · Contrast checker → · Palette generator →