#3F48BC#3F48BC

#3F48BC is a mid, vivid blue. Relative luminance 0.093; OKLCH L 46.7% C 0.180 H 273.7°. Best body text is #FFFFFF at 7.33:1 contrast (WCAG AA passes).

Color values

HEX	#3F48BC
RGB	rgb(63, 72, 188)
HSL	hsl(236, 50%, 49%)
HSV	hsv(236, 66%, 74%)
CMYK	cmyk(66.5%, 61.7%, 0%, 26.3%)
CIE-LAB	lab(36.60, 33.79, -62.23)
CIE-LCH	lch(36.60, 70.81, 298.51°)
OKLab	oklab(46.7% 0.0117 -0.1794)
OKLCH	oklch(46.7% 0.18 273.7)
XYZ	xyz(13.4413, 9.3211, 48.6580)
Luminance	0.0932 (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

#3F48BC #BCB33F

analogous

#3F87BC #3F48BC #753FBC

triadic

#3F48BC #BC3F48 #48BC3F

tetradic

#3F48BC #BC3F87 #BCB33F #3FBC75

square

#3F48BC #BC3F87 #BCB33F #3FBC75

split-complementary

#3F48BC #BC753F #87BC3F

monochromatic

#202560 #30368E #3F48BC #6B72CD #999EDD

Accessibility & contrast

On white

7.33

#3F48BC on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.86

#3F48BC on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F48BC

7.33:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F48BC	#FFFFFF	#000000	##FFFFFF
##3F48BC	1.00	7.33	2.86	7.33
#FFFFFF	7.33	1.00	21.00	1.00
#000000	2.86	21.00	1.00	21.00
##FFFFFF	7.33	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005CC0

Deuteranopia (green-blind)

#0051BA

Tritanopia (blue-blind)

#00657B

Achromatopsia (no color)

#565656

Design tokens & code

CSS

--color: #3f48bc;
/* rgb */ color: rgb(63, 72, 188);
/* oklch */ color: oklch(46.7% 0.180 273.7);

Tailwind

colors: {
  custom: {
    50: '#837bd1',
    500: '#3f48bc',
    950: '#000000',
  },
}

SCSS

$custom: #3f48bc;
$custom-light: #837bd1;
$custom-dark: #000000;

JSON

{
  "hex": "#3f48bc",
  "rgb": {
    "r": 63,
    "g": 72,
    "b": 188
  },
  "hsl": {
    "h": 235.68,
    "s": 49.801,
    "l": 49.216
  },
  "oklch": {
    "l": 0.46696,
    "c": 0.17976,
    "h": 273.7
  },
  "luminance": 0.09322
}

Semantic roles & 50–950 ramp

primary

#3F48BC

secondary

#C9C48E

accent

#CF4ED9

background

#F8F7FD

surface

#F0EDFA

border

#CBC8D3

text

#0C0914

muted

#7D7B83

Preview Lab

Preview with #3F48BC

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

Preview Lab → · Contrast checker → · Palette generator →