#3749B8#3749B8

#3749B8 is a mid, vivid blue. Relative luminance 0.090; OKLCH L 46.1% C 0.175 H 270.8°. Best body text is #FFFFFF at 7.48:1 contrast (WCAG AA passes).

Color values

HEX	#3749B8
RGB	rgb(55, 73, 184)
HSL	hsl(232, 54%, 47%)
HSV	hsv(232, 70%, 72%)
CMYK	cmyk(70.1%, 60.3%, 0%, 27.8%)
CIE-LAB	lab(36.06, 30.62, -60.77)
CIE-LCH	lch(36.06, 68.05, 296.74°)
OKLab	oklab(46.07% 0.0024 -0.1753)
OKLCH	oklch(46.07% 0.175 270.8)
XYZ	xyz(12.6069, 9.0368, 46.4180)
Luminance	0.0904 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3749B8 #B8A637

analogous

#378AB8 #3749B8 #6637B8

triadic

#3749B8 #B83749 #49B837

tetradic

#3749B8 #B8378A #B8A637 #37B866

square

#3749B8 #B8378A #B8A637 #37B866

split-complementary

#3749B8 #B86637 #8AB837

monochromatic

#1B245A #293689 #3749B8 #5D6DCF #8D98DD

Accessibility & contrast

On white

7.48

#3749B8 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.81

#3749B8 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3749B8

7.48:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3749B8	#FFFFFF	#000000	##FFFFFF
##3749B8	1.00	7.48	2.81	7.48
#FFFFFF	7.48	1.00	21.00	1.00
#000000	2.81	21.00	1.00	21.00
##FFFFFF	7.48	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005BBC

Deuteranopia (green-blind)

#004FB6

Tritanopia (blue-blind)

#006579

Achromatopsia (no color)

#555555

Design tokens & code

CSS

--color: #3749b8;
/* rgb */ color: rgb(55, 73, 184);
/* oklch */ color: oklch(46.1% 0.175 270.8);

Tailwind

colors: {
  custom: {
    50: '#7f7bce',
    500: '#3749b8',
    950: '#000000',
  },
}

SCSS

$custom: #3749b8;
$custom-light: #7f7bce;
$custom-dark: #000000;

JSON

{
  "hex": "#3749b8",
  "rgb": {
    "r": 55,
    "g": 73,
    "b": 184
  },
  "hsl": {
    "h": 231.628,
    "s": 53.975,
    "l": 46.863
  },
  "oklch": {
    "l": 0.46072,
    "c": 0.17532,
    "h": 270.8
  },
  "luminance": 0.09038
}

Semantic roles & 50–950 ramp

primary

#3749B8

secondary

#C7BE84

accent

#C94ADD

background

#F8F7FC

surface

#EFEEF9

border

#CAC9D2

text

#0B0914

muted

#7C7B82

Preview Lab

Preview with #3749B8

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

Preview Lab → · Contrast checker → · Palette generator →