#3F48B7#3F48B7

#3F48B7 is a mid, vivid blue. Relative luminance 0.091; OKLCH L 46.3% C 0.173 H 273.9°. Best body text is #FFFFFF at 7.44:1 contrast (WCAG AA passes).

Color values

HEX	#3F48B7
RGB	rgb(63, 72, 183)
HSL	hsl(236, 49%, 48%)
HSV	hsv(236, 66%, 72%)
CMYK	cmyk(65.6%, 60.7%, 0%, 28.2%)
CIE-LAB	lab(36.19, 32.06, -59.94)
CIE-LCH	lch(36.19, 67.97, 298.14°)
OKLab	oklab(46.27% 0.0119 -0.1727)
OKLCH	oklch(46.27% 0.173 273.9)
XYZ	xyz(12.9117, 9.1093, 45.8684)
Luminance	0.0911 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F48B7 #B7AE3F

analogous

#3F84B7 #3F48B7 #723FB7

triadic

#3F48B7 #B73F48 #48B73F

tetradic

#3F48B7 #B73F84 #B7AE3F #3FB772

square

#3F48B7 #B73F84 #B7AE3F #3FB772

split-complementary

#3F48B7 #B7723F #84B73F

monochromatic

#20245C #2F3689 #3F48B7 #6870CB #969BDB

Accessibility & contrast

On white

7.44

#3F48B7 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.82

#3F48B7 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F48B7

7.44:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F48B7	#FFFFFF	#000000	##FFFFFF
##3F48B7	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)

#005BBB

Deuteranopia (green-blind)

#0050B5

Tritanopia (blue-blind)

#006478

Achromatopsia (no color)

#555555

Design tokens & code

CSS

--color: #3f48b7;
/* rgb */ color: rgb(63, 72, 183);
/* oklch */ color: oklch(46.3% 0.173 273.9);

Tailwind

colors: {
  custom: {
    50: '#827bcd',
    500: '#3f48b7',
    950: '#000000',
  },
}

SCSS

$custom: #3f48b7;
$custom-light: #827bcd;
$custom-dark: #000000;

JSON

{
  "hex": "#3f48b7",
  "rgb": {
    "r": 63,
    "g": 72,
    "b": 183
  },
  "hsl": {
    "h": 235.5,
    "s": 48.78,
    "l": 48.235
  },
  "oklch": {
    "l": 0.46274,
    "c": 0.17307,
    "h": 273.9
  },
  "luminance": 0.0911
}

Semantic roles & 50–950 ramp

primary

#3F48B7

secondary

#C6C28B

accent

#CE4FD8

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0C0914

muted

#7D7B82

Preview Lab

Preview with #3F48B7

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

Preview Lab → · Contrast checker → · Palette generator →