#3749B9#3749B9

#3749B9 is a mid, vivid blue. Relative luminance 0.091; OKLCH L 46.2% C 0.177 H 270.8°. Best body text is #FFFFFF at 7.46:1 contrast (WCAG AA passes).

Color values

HEX	#3749B9
RGB	rgb(55, 73, 185)
HSL	hsl(232, 54%, 47%)
HSV	hsv(232, 70%, 73%)
CMYK	cmyk(70.3%, 60.5%, 0%, 27.5%)
CIE-LAB	lab(36.14, 30.98, -61.23)
CIE-LCH	lch(36.14, 68.62, 296.83°)
OKLab	oklab(46.16% 0.0024 -0.1766)
OKLCH	oklch(46.16% 0.177 270.8)
XYZ	xyz(12.7121, 9.0788, 46.9720)
Luminance	0.0908 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3749B9 #B9A737

analogous

#378AB9 #3749B9 #6637B9

triadic

#3749B9 #B93749 #49B937

tetradic

#3749B9 #B9378A #B9A737 #37B966

square

#3749B9 #B9378A #B9A737 #37B966

split-complementary

#3749B9 #B96637 #8AB937

monochromatic

#1B245B #29368A #3749B9 #5E6ECF #8D98DD

Accessibility & contrast

On white

7.46

#3749B9 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.82

#3749B9 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3749B9

7.46:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3749B9	#FFFFFF	#000000	##FFFFFF
##3749B9	1.00	7.46	2.82	7.46
#FFFFFF	7.46	1.00	21.00	1.00
#000000	2.82	21.00	1.00	21.00
##FFFFFF	7.46	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005BBD

Deuteranopia (green-blind)

#004FB7

Tritanopia (blue-blind)

#00657A

Achromatopsia (no color)

#555555

Design tokens & code

CSS

--color: #3749b9;
/* rgb */ color: rgb(55, 73, 185);
/* oklch */ color: oklch(46.2% 0.177 270.8);

Tailwind

colors: {
  custom: {
    50: '#7f7bcf',
    500: '#3749b9',
    950: '#000000',
  },
}

SCSS

$custom: #3749b9;
$custom-light: #7f7bcf;
$custom-dark: #000000;

JSON

{
  "hex": "#3749b9",
  "rgb": {
    "r": 55,
    "g": 73,
    "b": 185
  },
  "hsl": {
    "h": 231.692,
    "s": 54.167,
    "l": 47.059
  },
  "oklch": {
    "l": 0.46157,
    "c": 0.17666,
    "h": 270.8
  },
  "luminance": 0.0908
}

Semantic roles & 50–950 ramp

primary

#3749B9

secondary

#C8BE84

accent

#C94ADE

background

#F8F7FC

surface

#EFEEF9

border

#CAC9D2

text

#0B0914

muted

#7C7B82

Preview Lab

Preview with #3749B9

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

Preview Lab → · Contrast checker → · Palette generator →