#3F48BE#3F48BE

#3F48BE is a mid, vivid blue. Relative luminance 0.094; OKLCH L 46.9% C 0.182 H 273.7°. Best body text is #FFFFFF at 7.29:1 contrast (WCAG AA passes).

Color values

HEX	#3F48BE
RGB	rgb(63, 72, 190)
HSL	hsl(236, 50%, 50%)
HSV	hsv(236, 67%, 75%)
CMYK	cmyk(66.8%, 62.1%, 0%, 25.5%)
CIE-LAB	lab(36.76, 34.49, -63.13)
CIE-LCH	lch(36.76, 71.94, 298.65°)
OKLab	oklab(46.87% 0.0116 -0.182)
OKLCH	oklch(46.87% 0.182 273.7)
XYZ	xyz(13.6584, 9.4080, 49.8013)
Luminance	0.0941 (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

#3F48BE #BEB53F

analogous

#3F88BE #3F48BE #763FBE

triadic

#3F48BE #BE3F48 #48BE3F

tetradic

#3F48BE #BE3F88 #BEB53F #3FBE76

square

#3F48BE #BE3F88 #BEB53F #3FBE76

split-complementary

#3F48BE #BE763F #88BE3F

monochromatic

#212562 #303790 #3F48BE #6C73CE #9A9FDD

Accessibility & contrast

On white

7.29

#3F48BE on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.88

#3F48BE on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F48BE

7.29:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F48BE	#FFFFFF	#000000	##FFFFFF
##3F48BE	1.00	7.29	2.88	7.29
#FFFFFF	7.29	1.00	21.00	1.00
#000000	2.88	21.00	1.00	21.00
##FFFFFF	7.29	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005CC2

Deuteranopia (green-blind)

#0051BC

Tritanopia (blue-blind)

#00667C

Achromatopsia (no color)

#565656

Design tokens & code

CSS

--color: #3f48be;
/* rgb */ color: rgb(63, 72, 190);
/* oklch */ color: oklch(46.9% 0.182 273.7);

Tailwind

colors: {
  custom: {
    50: '#837bd3',
    500: '#3f48be',
    950: '#000000',
  },
}

SCSS

$custom: #3f48be;
$custom-light: #837bd3;
$custom-dark: #000000;

JSON

{
  "hex": "#3f48be",
  "rgb": {
    "r": 63,
    "g": 72,
    "b": 190
  },
  "hsl": {
    "h": 235.748,
    "s": 50.198,
    "l": 49.608
  },
  "oklch": {
    "l": 0.46866,
    "c": 0.18241,
    "h": 273.7
  },
  "luminance": 0.09409
}

Semantic roles & 50–950 ramp

primary

#3F48BE

secondary

#C9C58F

accent

#D04EDA

background

#F8F7FD

surface

#F0EDFA

border

#CBC8D3

text

#0C0914

muted

#7D7B83

Preview Lab

Preview with #3F48BE

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

Preview Lab → · Contrast checker → · Palette generator →