#3F49BB#3F49BB

#3F49BB is a mid, vivid blue. Relative luminance 0.094; OKLCH L 46.8% C 0.177 H 273.5°. Best body text is #FFFFFF at 7.29:1 contrast (WCAG AA passes).

Color values

HEX	#3F49BB
RGB	rgb(63, 73, 187)
HSL	hsl(235, 50%, 49%)
HSV	hsv(235, 66%, 73%)
CMYK	cmyk(66.3%, 61%, 0%, 26.7%)
CIE-LAB	lab(36.76, 32.81, -61.37)
CIE-LCH	lch(36.76, 69.59, 298.13°)
OKLab	oklab(46.79% 0.0109 -0.1769)
OKLCH	oklch(46.79% 0.177 273.5)
XYZ	xyz(13.3991, 9.4085, 48.1140)
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

#3F49BB #BBB13F

analogous

#3F87BB #3F49BB #733FBB

triadic

#3F49BB #BB3F49 #49BB3F

tetradic

#3F49BB #BB3F87 #BBB13F #3FBB73

square

#3F49BB #BB3F87 #BBB13F #3FBB73

split-complementary

#3F49BB #BB733F #87BB3F

monochromatic

#20255F #30378D #3F49BB #6A72CD #989EDC

Accessibility & contrast

On white

7.29

#3F49BB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.88

#3F49BB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F49BB

7.29:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F49BB	#FFFFFF	#000000	##FFFFFF
##3F49BB	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)

#005CBF

Deuteranopia (green-blind)

#0051B9

Tritanopia (blue-blind)

#00657B

Achromatopsia (no color)

#565656

Design tokens & code

CSS

--color: #3f49bb;
/* rgb */ color: rgb(63, 73, 187);
/* oklch */ color: oklch(46.8% 0.177 273.5);

Tailwind

colors: {
  custom: {
    50: '#837bd0',
    500: '#3f49bb',
    950: '#000000',
  },
}

SCSS

$custom: #3f49bb;
$custom-light: #837bd0;
$custom-dark: #000000;

JSON

{
  "hex": "#3f49bb",
  "rgb": {
    "r": 63,
    "g": 73,
    "b": 187
  },
  "hsl": {
    "h": 235.161,
    "s": 49.6,
    "l": 49.02
  },
  "oklch": {
    "l": 0.46792,
    "c": 0.1772,
    "h": 273.5
  },
  "luminance": 0.0941
}

Semantic roles & 50–950 ramp

primary

#3F49BB

secondary

#C8C38E

accent

#CE4FD9

background

#F8F7FC

surface

#F0EEF9

border

#CBC9D2

text

#0C0914

muted

#7D7B82

Preview Lab

Preview with #3F49BB

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

Preview Lab → · Contrast checker → · Palette generator →