#3748B9#3748B9

#3748B9 is a mid, vivid blue. Relative luminance 0.089; OKLCH L 46.0% C 0.178 H 271.0°. Best body text is #FFFFFF at 7.53:1 contrast (WCAG AA passes).

Color values

HEX	#3748B9
RGB	rgb(55, 72, 185)
HSL	hsl(232, 54%, 47%)
HSV	hsv(232, 70%, 73%)
CMYK	cmyk(70.3%, 61.1%, 0%, 27.5%)
CIE-LAB	lab(35.88, 31.62, -61.64)
CIE-LCH	lch(35.88, 69.28, 297.16°)
OKLab	oklab(45.97% 0.0032 -0.1779)
OKLCH	oklch(45.97% 0.178 271)
XYZ	xyz(12.6469, 8.9485, 46.9503)
Luminance	0.0895 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3748B9 #B9A837

analogous

#3789B9 #3748B9 #6737B9

triadic

#3748B9 #B93748 #48B937

tetradic

#3748B9 #B93789 #B9A837 #37B967

square

#3748B9 #B93789 #B9A837 #37B967

split-complementary

#3748B9 #B96737 #89B937

monochromatic

#1B235B #29368A #3748B9 #5E6DCF #8D98DD

Accessibility & contrast

On white

7.53

#3748B9 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.79

#3748B9 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3748B9

7.53:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3748B9	#FFFFFF	#000000	##FFFFFF
##3748B9	1.00	7.53	2.79	7.53
#FFFFFF	7.53	1.00	21.00	1.00
#000000	2.79	21.00	1.00	21.00
##FFFFFF	7.53	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005BBD

Deuteranopia (green-blind)

#004FB7

Tritanopia (blue-blind)

#006579

Achromatopsia (no color)

#545454

Design tokens & code

CSS

--color: #3748b9;
/* rgb */ color: rgb(55, 72, 185);
/* oklch */ color: oklch(46.0% 0.178 271.0);

Tailwind

colors: {
  custom: {
    50: '#7f7bcf',
    500: '#3748b9',
    950: '#000000',
  },
}

SCSS

$custom: #3748b9;
$custom-light: #7f7bcf;
$custom-dark: #000000;

JSON

{
  "hex": "#3748b9",
  "rgb": {
    "r": 55,
    "g": 72,
    "b": 185
  },
  "hsl": {
    "h": 232.154,
    "s": 54.167,
    "l": 47.059
  },
  "oklch": {
    "l": 0.45971,
    "c": 0.17789,
    "h": 271
  },
  "luminance": 0.0895
}

Semantic roles & 50–950 ramp

primary

#3748B9

secondary

#C8BF84

accent

#CA4ADE

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0B0914

muted

#7C7B82

Preview Lab

Preview with #3748B9

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

Preview Lab → · Contrast checker → · Palette generator →