#3F49B2#3F49B2

#3F49B2 is a mid, vivid blue. Relative luminance 0.090; OKLCH L 46.0% C 0.165 H 273.8°. Best body text is #FFFFFF at 7.48:1 contrast (WCAG AA passes).

Color values

HEX	#3F49B2
RGB	rgb(63, 73, 178)
HSL	hsl(235, 48%, 47%)
HSV	hsv(235, 65%, 70%)
CMYK	cmyk(64.6%, 59%, 0%, 30.2%)
CIE-LAB	lab(36.05, 29.68, -57.22)
CIE-LCH	lch(36.05, 64.45, 297.41°)
OKLab	oklab(46.05% 0.0111 -0.1646)
OKLCH	oklch(46.05% 0.165 273.8)
XYZ	xyz(12.4657, 9.0351, 43.1979)
Luminance	0.0904 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 6.03

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F49B2 #B2A83F

analogous

#3F82B2 #3F49B2 #6F3FB2

triadic

#3F49B2 #B23F49 #49B23F

tetradic

#3F49B2 #B23F82 #B2A83F #3FB26F

square

#3F49B2 #B23F82 #B2A83F #3FB26F

split-complementary

#3F49B2 #B26F3F #82B23F

monochromatic

#1F2458 #2F3685 #3F49B2 #666EC9 #9399D9

Accessibility & contrast

On white

7.48

#3F49B2 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.81

#3F49B2 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F49B2

7.48:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F49B2	#FFFFFF	#000000	##FFFFFF
##3F49B2	1.00	7.48	2.81	7.48
#FFFFFF	7.48	1.00	21.00	1.00
#000000	2.81	21.00	1.00	21.00
##FFFFFF	7.48	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005AB6

Deuteranopia (green-blind)

#0050B0

Tritanopia (blue-blind)

#006376

Achromatopsia (no color)

#555555

Design tokens & code

CSS

--color: #3f49b2;
/* rgb */ color: rgb(63, 73, 178);
/* oklch */ color: oklch(46.0% 0.165 273.8);

Tailwind

colors: {
  custom: {
    50: '#817bca',
    500: '#3f49b2',
    950: '#000000',
  },
}

SCSS

$custom: #3f49b2;
$custom-light: #817bca;
$custom-dark: #000000;

JSON

{
  "hex": "#3f49b2",
  "rgb": {
    "r": 63,
    "g": 73,
    "b": 178
  },
  "hsl": {
    "h": 234.783,
    "s": 47.718,
    "l": 47.255
  },
  "oklch": {
    "l": 0.46047,
    "c": 0.16502,
    "h": 273.8
  },
  "luminance": 0.09036
}

Semantic roles & 50–950 ramp

primary

#3F49B2

secondary

#C4BF89

accent

#CC50D7

background

#F8F7FC

surface

#F0EEF8

border

#CBC9D1

text

#0B0913

muted

#7C7B82

Preview Lab

Preview with #3F49B2

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

Preview Lab → · Contrast checker → · Palette generator →