#3F47BA#3F47BA

#3F47BA is a mid, vivid blue. Relative luminance 0.091; OKLCH L 46.3% C 0.178 H 274.0°. Best body text is #FFFFFF at 7.44:1 contrast (WCAG AA passes).

Color values

HEX	#3F47BA
RGB	rgb(63, 71, 186)
HSL	hsl(236, 49%, 49%)
HSV	hsv(236, 66%, 73%)
CMYK	cmyk(66.1%, 61.8%, 0%, 27.1%)
CIE-LAB	lab(36.19, 33.73, -61.71)
CIE-LCH	lch(36.19, 70.33, 298.66°)
OKLab	oklab(46.35% 0.0126 -0.1779)
OKLCH	oklch(46.35% 0.178 274)
XYZ	xyz(13.1631, 9.1072, 47.5090)
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

#3F47BA #BAB23F

analogous

#3F85BA #3F47BA #753FBA

triadic

#3F47BA #BA3F47 #47BA3F

tetradic

#3F47BA #BA3F85 #BAB23F #3FBA75

square

#3F47BA #BA3F85 #BAB23F #3FBA75

split-complementary

#3F47BA #BA753F #85BA3F

monochromatic

#20245F #30368C #3F47BA #6A70CC #979CDC

Accessibility & contrast

On white

7.44

#3F47BA on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.82

#3F47BA on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F47BA

7.44:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F47BA	#FFFFFF	#000000	##FFFFFF
##3F47BA	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)

#005BBE

Deuteranopia (green-blind)

#0050B8

Tritanopia (blue-blind)

#00647A

Achromatopsia (no color)

#555555

Design tokens & code

CSS

--color: #3f47ba;
/* rgb */ color: rgb(63, 71, 186);
/* oklch */ color: oklch(46.3% 0.178 274.0);

Tailwind

colors: {
  custom: {
    50: '#837ad0',
    500: '#3f47ba',
    950: '#000000',
  },
}

SCSS

$custom: #3f47ba;
$custom-light: #837ad0;
$custom-dark: #000000;

JSON

{
  "hex": "#3f47ba",
  "rgb": {
    "r": 63,
    "g": 71,
    "b": 186
  },
  "hsl": {
    "h": 236.098,
    "s": 49.398,
    "l": 48.824
  },
  "oklch": {
    "l": 0.46347,
    "c": 0.17832,
    "h": 274
  },
  "luminance": 0.09108
}

Semantic roles & 50–950 ramp

primary

#3F47BA

secondary

#C8C48D

accent

#D04FD9

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0C0914

muted

#7D7B82

Preview Lab

Preview with #3F47BA

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

Preview Lab → · Contrast checker → · Palette generator →