#3F49B3#3F49B3

#3F49B3 is a mid, vivid blue. Relative luminance 0.091; OKLCH L 46.1% C 0.166 H 273.8°. Best body text is #FFFFFF at 7.46:1 contrast (WCAG AA passes).

Color values

HEX	#3F49B3
RGB	rgb(63, 73, 179)
HSL	hsl(235, 48%, 47%)
HSV	hsv(235, 65%, 70%)
CMYK	cmyk(64.8%, 59.2%, 0%, 29.8%)
CIE-LAB	lab(36.13, 30.02, -57.68)
CIE-LCH	lch(36.13, 65.03, 297.50°)
OKLab	oklab(46.13% 0.0111 -0.166)
OKLCH	oklch(46.13% 0.166 273.8)
XYZ	xyz(12.5664, 9.0754, 43.7286)
Luminance	0.0908 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 5.94

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F49B3 #B3A93F

analogous

#3F83B3 #3F49B3 #6F3FB3

triadic

#3F49B3 #B33F49 #49B33F

tetradic

#3F49B3 #B33F83 #B3A93F #3FB36F

square

#3F49B3 #B33F83 #B3A93F #3FB36F

split-complementary

#3F49B3 #B36F3F #83B33F

monochromatic

#1F2458 #2F3786 #3F49B3 #666FC9 #9399D9

Accessibility & contrast

On white

7.46

#3F49B3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.82

#3F49B3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F49B3

7.46:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F49B3	#FFFFFF	#000000	##FFFFFF
##3F49B3	1.00	7.46	2.82	7.46
#FFFFFF	7.46	1.00	21.00	1.00
#000000	2.82	21.00	1.00	21.00
##FFFFFF	7.46	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005AB7

Deuteranopia (green-blind)

#0050B1

Tritanopia (blue-blind)

#006377

Achromatopsia (no color)

#555555

Design tokens & code

CSS

--color: #3f49b3;
/* rgb */ color: rgb(63, 73, 179);
/* oklch */ color: oklch(46.1% 0.166 273.8);

Tailwind

colors: {
  custom: {
    50: '#817bcb',
    500: '#3f49b3',
    950: '#000000',
  },
}

SCSS

$custom: #3f49b3;
$custom-light: #817bcb;
$custom-dark: #000000;

JSON

{
  "hex": "#3f49b3",
  "rgb": {
    "r": 63,
    "g": 73,
    "b": 179
  },
  "hsl": {
    "h": 234.828,
    "s": 47.934,
    "l": 47.451
  },
  "oklch": {
    "l": 0.46128,
    "c": 0.16639,
    "h": 273.8
  },
  "luminance": 0.09077
}

Semantic roles & 50–950 ramp

primary

#3F49B3

secondary

#C4BF89

accent

#CC50D8

background

#F8F7FC

surface

#F0EEF9

border

#CBC9D2

text

#0B0913

muted

#7C7B82

Preview Lab

Preview with #3F49B3

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

Preview Lab → · Contrast checker → · Palette generator →