#3745BB#3745BB

#3745BB is a mid, vivid blue. Relative luminance 0.087; OKLCH L 45.6% C 0.184 H 271.7°. Best body text is #FFFFFF at 7.69:1 contrast (WCAG AA passes).

Color values

HEX	#3745BB
RGB	rgb(55, 69, 187)
HSL	hsl(234, 55%, 47%)
HSV	hsv(234, 71%, 73%)
CMYK	cmyk(70.6%, 63.1%, 0%, 26.7%)
CIE-LAB	lab(35.31, 34.25, -63.75)
CIE-LCH	lch(35.31, 72.37, 298.24°)
OKLab	oklab(45.6% 0.0053 -0.1841)
OKLCH	oklch(45.6% 0.184 271.7)
XYZ	xyz(12.6703, 8.6551, 48.0069)
Luminance	0.0866 (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

#3745BB #BBAD37

analogous

#3787BB #3745BB #6B37BB

triadic

#3745BB #BB3745 #45BB37

tetradic

#3745BB #BB3787 #BBAD37 #37BB6B

square

#3745BB #BB3787 #BBAD37 #37BB6B

split-complementary

#3745BB #BB6B37 #87BB37

monochromatic

#1B225C #29348C #3745BB #5F6BD0 #8E97DE

Accessibility & contrast

On white

7.69

#3745BB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.73

#3745BB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3745BB

7.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3745BB	#FFFFFF	#000000	##FFFFFF
##3745BB	1.00	7.69	2.73	7.69
#FFFFFF	7.69	1.00	21.00	1.00
#000000	2.73	21.00	1.00	21.00
##FFFFFF	7.69	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0059BF

Deuteranopia (green-blind)

#004DB9

Tritanopia (blue-blind)

#006379

Achromatopsia (no color)

#535353

Design tokens & code

CSS

--color: #3745bb;
/* rgb */ color: rgb(55, 69, 187);
/* oklch */ color: oklch(45.6% 0.184 271.7);

Tailwind

colors: {
  custom: {
    50: '#7f78d0',
    500: '#3745bb',
    950: '#000000',
  },
}

SCSS

$custom: #3745bb;
$custom-light: #7f78d0;
$custom-dark: #000000;

JSON

{
  "hex": "#3745bb",
  "rgb": {
    "r": 55,
    "g": 69,
    "b": 187
  },
  "hsl": {
    "h": 233.636,
    "s": 54.545,
    "l": 47.451
  },
  "oklch": {
    "l": 0.456,
    "c": 0.18416,
    "h": 271.7
  },
  "luminance": 0.08656
}

Semantic roles & 50–950 ramp

primary

#3745BB

secondary

#C9C185

accent

#CE4ADE

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0C0914

muted

#7D7B82

Preview Lab

Preview with #3745BB

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

Preview Lab → · Contrast checker → · Palette generator →