#3749BA#3749BA

#3749BA is a mid, vivid blue. Relative luminance 0.091; OKLCH L 46.2% C 0.178 H 270.8°. Best body text is #FFFFFF at 7.44:1 contrast (WCAG AA passes).

Color values

HEX	#3749BA
RGB	rgb(55, 73, 186)
HSL	hsl(232, 54%, 47%)
HSV	hsv(232, 70%, 73%)
CMYK	cmyk(70.4%, 60.8%, 0%, 27.1%)
CIE-LAB	lab(36.22, 31.34, -61.69)
CIE-LCH	lch(36.22, 69.19, 296.93°)
OKLab	oklab(46.24% 0.0024 -0.178)
OKLCH	oklch(46.24% 0.178 270.8)
XYZ	xyz(12.8180, 9.1212, 47.5299)
Luminance	0.0912 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3749BA #BAA837

analogous

#378ABA #3749BA #6737BA

triadic

#3749BA #BA3749 #49BA37

tetradic

#3749BA #BA378A #BAA837 #37BA67

square

#3749BA #BA378A #BAA837 #37BA67

split-complementary

#3749BA #BA6737 #8ABA37

monochromatic

#1B245C #29368B #3749BA #5F6ED0 #8E99DE

Accessibility & contrast

On white

7.44

#3749BA on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.82

#3749BA on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3749BA

7.44:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3749BA	#FFFFFF	#000000	##FFFFFF
##3749BA	1.00	7.44	2.82	7.44
#FFFFFF	7.44	1.00	21.00	1.00
#000000	2.82	21.00	1.00	21.00
##FFFFFF	7.44	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005BBE

Deuteranopia (green-blind)

#004FB8

Tritanopia (blue-blind)

#00657A

Achromatopsia (no color)

#555555

Design tokens & code

CSS

--color: #3749ba;
/* rgb */ color: rgb(55, 73, 186);
/* oklch */ color: oklch(46.2% 0.178 270.8);

Tailwind

colors: {
  custom: {
    50: '#7f7bd0',
    500: '#3749ba',
    950: '#000000',
  },
}

SCSS

$custom: #3749ba;
$custom-light: #7f7bd0;
$custom-dark: #000000;

JSON

{
  "hex": "#3749ba",
  "rgb": {
    "r": 55,
    "g": 73,
    "b": 186
  },
  "hsl": {
    "h": 231.756,
    "s": 54.357,
    "l": 47.255
  },
  "oklch": {
    "l": 0.46242,
    "c": 0.178,
    "h": 270.8
  },
  "luminance": 0.09122
}

Semantic roles & 50–950 ramp

primary

#3749BA

secondary

#C8BF85

accent

#C94ADE

background

#F8F7FC

surface

#F0EEF9

border

#CBC9D2

text

#0B0914

muted

#7C7B82

Preview Lab

Preview with #3749BA

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

Preview Lab → · Contrast checker → · Palette generator →