#3F4BB3#3F4BB3

#3F4BB3 is a mid, vivid blue. Relative luminance 0.093; OKLCH L 46.5% C 0.164 H 273.2°. Best body text is #FFFFFF at 7.32:1 contrast (WCAG AA passes).

Color values

HEX	#3F4BB3
RGB	rgb(63, 75, 179)
HSL	hsl(234, 48%, 47%)
HSV	hsv(234, 65%, 70%)
CMYK	cmyk(64.8%, 58.1%, 0%, 29.8%)
CIE-LAB	lab(36.64, 28.74, -56.86)
CIE-LCH	lch(36.64, 63.71, 296.82°)
OKLab	oklab(46.5% 0.0093 -0.1636)
OKLCH	oklch(46.5% 0.164 273.2)
XYZ	xyz(12.7000, 9.3425, 43.7731)
Luminance	0.0934 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F4BB3 #B3A73F

analogous

#3F85B3 #3F4BB3 #6D3FB3

triadic

#3F4BB3 #B33F4B #4BB33F

tetradic

#3F4BB3 #B33F85 #B3A73F #3FB36D

square

#3F4BB3 #B33F85 #B3A73F #3FB36D

split-complementary

#3F4BB3 #B36D3F #85B33F

monochromatic

#1F2558 #2F3886 #3F4BB3 #6670C9 #939BD9

Accessibility & contrast

On white

7.32

#3F4BB3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.87

#3F4BB3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F4BB3

7.32:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F4BB3	#FFFFFF	#000000	##FFFFFF
##3F4BB3	1.00	7.32	2.87	7.32
#FFFFFF	7.32	1.00	21.00	1.00
#000000	2.87	21.00	1.00	21.00
##FFFFFF	7.32	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005BB6

Deuteranopia (green-blind)

#0051B1

Tritanopia (blue-blind)

#006477

Achromatopsia (no color)

#565656

Design tokens & code

CSS

--color: #3f4bb3;
/* rgb */ color: rgb(63, 75, 179);
/* oklch */ color: oklch(46.5% 0.164 273.2);

Tailwind

colors: {
  custom: {
    50: '#817dca',
    500: '#3f4bb3',
    950: '#000000',
  },
}

SCSS

$custom: #3f4bb3;
$custom-light: #817dca;
$custom-dark: #000000;

JSON

{
  "hex": "#3f4bb3",
  "rgb": {
    "r": 63,
    "g": 75,
    "b": 179
  },
  "hsl": {
    "h": 233.793,
    "s": 47.934,
    "l": 47.451
  },
  "oklch": {
    "l": 0.46504,
    "c": 0.16384,
    "h": 273.2
  },
  "luminance": 0.09344
}

Semantic roles & 50–950 ramp

primary

#3F4BB3

secondary

#C4BE89

accent

#CA50D8

background

#F8F7FC

surface

#F0EEF8

border

#CBC9D1

text

#0B0913

muted

#7C7B82

Preview Lab

Preview with #3F4BB3

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

Preview Lab → · Contrast checker → · Palette generator →