#3749B7#3749B7

#3749B7 is a mid, vivid blue. Relative luminance 0.090; OKLCH L 46.0% C 0.174 H 270.8°. Best body text is #FFFFFF at 7.50:1 contrast (WCAG AA passes).

Color values

HEX	#3749B7
RGB	rgb(55, 73, 183)
HSL	hsl(232, 54%, 47%)
HSV	hsv(232, 70%, 72%)
CMYK	cmyk(69.9%, 60.1%, 0%, 28.2%)
CIE-LAB	lab(35.97, 30.26, -60.32)
CIE-LCH	lch(35.97, 67.48, 296.64°)
OKLab	oklab(45.99% 0.0024 -0.174)
OKLCH	oklch(45.99% 0.174 270.8)
XYZ	xyz(12.5024, 8.9950, 45.8679)
Luminance	0.0900 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3749B7 #B7A537

analogous

#3789B7 #3749B7 #6537B7

triadic

#3749B7 #B73749 #49B737

tetradic

#3749B7 #B73789 #B7A537 #37B765

square

#3749B7 #B73789 #B7A537 #37B765

split-complementary

#3749B7 #B76537 #89B737

monochromatic

#1B2359 #293688 #3749B7 #5D6DCE #8C97DC

Accessibility & contrast

On white

7.50

#3749B7 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.80

#3749B7 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3749B7

7.50:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3749B7	#FFFFFF	#000000	##FFFFFF
##3749B7	1.00	7.50	2.80	7.50
#FFFFFF	7.50	1.00	21.00	1.00
#000000	2.80	21.00	1.00	21.00
##FFFFFF	7.50	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005BBB

Deuteranopia (green-blind)

#004FB5

Tritanopia (blue-blind)

#006579

Achromatopsia (no color)

#555555

Design tokens & code

CSS

--color: #3749b7;
/* rgb */ color: rgb(55, 73, 183);
/* oklch */ color: oklch(46.0% 0.174 270.8);

Tailwind

colors: {
  custom: {
    50: '#7e7bcd',
    500: '#3749b7',
    950: '#000000',
  },
}

SCSS

$custom: #3749b7;
$custom-light: #7e7bcd;
$custom-dark: #000000;

JSON

{
  "hex": "#3749b7",
  "rgb": {
    "r": 55,
    "g": 73,
    "b": 183
  },
  "hsl": {
    "h": 231.563,
    "s": 53.782,
    "l": 46.667
  },
  "oklch": {
    "l": 0.45987,
    "c": 0.17398,
    "h": 270.8
  },
  "luminance": 0.08996
}

Semantic roles & 50–950 ramp

primary

#3749B7

secondary

#C7BD83

accent

#C94BDD

background

#F8F7FC

surface

#EFEEF9

border

#CAC9D2

text

#0B0914

muted

#7C7B82

Preview Lab

Preview with #3749B7

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

Preview Lab → · Contrast checker → · Palette generator →