#3F48BB#3F48BB

#3F48BB is a mid, vivid blue. Relative luminance 0.093; OKLCH L 46.6% C 0.178 H 273.8°. Best body text is #FFFFFF at 7.35:1 contrast (WCAG AA passes).

Color values

HEX	#3F48BB
RGB	rgb(63, 72, 187)
HSL	hsl(236, 50%, 49%)
HSV	hsv(236, 66%, 73%)
CMYK	cmyk(66.3%, 61.5%, 0%, 26.7%)
CIE-LAB	lab(36.51, 33.45, -61.77)
CIE-LCH	lch(36.51, 70.24, 298.43°)
OKLab	oklab(46.61% 0.0117 -0.178)
OKLCH	oklch(46.61% 0.178 273.8)
XYZ	xyz(13.3339, 9.2782, 48.0923)
Luminance	0.0928 (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

#3F48BB #BBB23F

analogous

#3F86BB #3F48BB #743FBB

triadic

#3F48BB #BB3F48 #48BB3F

tetradic

#3F48BB #BB3F86 #BBB23F #3FBB74

square

#3F48BB #BB3F86 #BBB23F #3FBB74

split-complementary

#3F48BB #BB743F #86BB3F

monochromatic

#20255F #30368D #3F48BB #6A71CD #989DDC

Accessibility & contrast

On white

7.35

#3F48BB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.86

#3F48BB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F48BB

7.35:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F48BB	#FFFFFF	#000000	##FFFFFF
##3F48BB	1.00	7.35	2.86	7.35
#FFFFFF	7.35	1.00	21.00	1.00
#000000	2.86	21.00	1.00	21.00
##FFFFFF	7.35	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005CBF

Deuteranopia (green-blind)

#0050B9

Tritanopia (blue-blind)

#00657A

Achromatopsia (no color)

#565656

Design tokens & code

CSS

--color: #3f48bb;
/* rgb */ color: rgb(63, 72, 187);
/* oklch */ color: oklch(46.6% 0.178 273.8);

Tailwind

colors: {
  custom: {
    50: '#837bd0',
    500: '#3f48bb',
    950: '#000000',
  },
}

SCSS

$custom: #3f48bb;
$custom-light: #837bd0;
$custom-dark: #000000;

JSON

{
  "hex": "#3f48bb",
  "rgb": {
    "r": 63,
    "g": 72,
    "b": 187
  },
  "hsl": {
    "h": 235.645,
    "s": 49.6,
    "l": 49.02
  },
  "oklch": {
    "l": 0.46611,
    "c": 0.17843,
    "h": 273.8
  },
  "luminance": 0.09279
}

Semantic roles & 50–950 ramp

primary

#3F48BB

secondary

#C8C48E

accent

#CF4FD9

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0C0914

muted

#7D7B82

Preview Lab

Preview with #3F48BB

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

Preview Lab → · Contrast checker → · Palette generator →