#373EBB#373EBB

#373EBB is a dark, vivid blue. Relative luminance 0.078; OKLCH L 44.4% C 0.192 H 273.0°. Best body text is #FFFFFF at 8.17:1 contrast (WCAG AA passes).

Color values

HEX	#373EBB
RGB	rgb(55, 62, 187)
HSL	hsl(237, 55%, 47%)
HSV	hsv(237, 71%, 73%)
CMYK	cmyk(70.6%, 66.8%, 0%, 26.7%)
CIE-LAB	lab(33.66, 38.63, -66.47)
CIE-LCH	lch(33.66, 76.88, 300.17°)
OKLab	oklab(44.39% 0.0101 -0.1921)
OKLCH	oklch(44.39% 0.192 273)
XYZ	xyz(12.2648, 7.8441, 47.8718)
Luminance	0.0785 (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

#373EBB #BBB437

analogous

#3780BB #373EBB #7237BB

triadic

#373EBB #BB373E #3EBB37

tetradic

#373EBB #BB3780 #BBB437 #37BB72

square

#373EBB #BB3780 #BBB437 #37BB72

split-complementary

#373EBB #BB7237 #80BB37

monochromatic

#1B1F5C #292E8C #373EBB #5F65D0 #8E93DE

Accessibility & contrast

On white

8.17

#373EBB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.57

#373EBB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #373EBB

8.17:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##373EBB	#FFFFFF	#000000	##FFFFFF
##373EBB	1.00	8.17	2.57	8.17
#FFFFFF	8.17	1.00	21.00	1.00
#000000	2.57	21.00	1.00	21.00
##FFFFFF	8.17	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0055BF

Deuteranopia (green-blind)

#0049B9

Tritanopia (blue-blind)

#005F77

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #373ebb;
/* rgb */ color: rgb(55, 62, 187);
/* oklch */ color: oklch(44.4% 0.192 273.0);

Tailwind

colors: {
  custom: {
    50: '#8074d1',
    500: '#373ebb',
    950: '#000000',
  },
}

SCSS

$custom: #373ebb;
$custom-light: #8074d1;
$custom-dark: #000000;

JSON

{
  "hex": "#373ebb",
  "rgb": {
    "r": 55,
    "g": 62,
    "b": 187
  },
  "hsl": {
    "h": 236.818,
    "s": 54.545,
    "l": 47.451
  },
  "oklch": {
    "l": 0.4439,
    "c": 0.19234,
    "h": 273
  },
  "luminance": 0.07845
}

Semantic roles & 50–950 ramp

primary

#373EBB

secondary

#C9C585

accent

#D64ADE

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0C0814

muted

#7D7B82

Preview Lab

Preview with #373EBB

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

Preview Lab → · Contrast checker → · Palette generator →