#3F44BB#3F44BB

#3F44BB is a mid, vivid blue. Relative luminance 0.088; OKLCH L 45.9% C 0.183 H 274.7°. Best body text is #FFFFFF at 7.62:1 contrast (WCAG AA passes).

Color values

HEX	#3F44BB
RGB	rgb(63, 68, 187)
HSL	hsl(238, 50%, 49%)
HSV	hsv(238, 66%, 73%)
CMYK	cmyk(66.3%, 63.6%, 0%, 26.7%)
CIE-LAB	lab(35.55, 35.96, -63.34)
CIE-LCH	lch(35.55, 72.83, 299.58°)
OKLab	oklab(45.91% 0.0149 -0.1827)
OKLCH	oklch(45.91% 0.183 274.7)
XYZ	xyz(13.0837, 8.7777, 48.0088)
Luminance	0.0878 (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

#3F44BB #BBB63F

analogous

#3F82BB #3F44BB #783FBB

triadic

#3F44BB #BB3F44 #44BB3F

tetradic

#3F44BB #BB3F82 #BBB63F #3FBB78

square

#3F44BB #BB3F82 #BBB63F #3FBB78

split-complementary

#3F44BB #BB783F #82BB3F

monochromatic

#20235F #30338D #3F44BB #6A6ECD #989BDC

Accessibility & contrast

On white

7.62

#3F44BB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.76

#3F44BB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F44BB

7.62:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F44BB	#FFFFFF	#000000	##FFFFFF
##3F44BB	1.00	7.62	2.76	7.62
#FFFFFF	7.62	1.00	21.00	1.00
#000000	2.76	21.00	1.00	21.00
##FFFFFF	7.62	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0059BF

Deuteranopia (green-blind)

#004EB9

Tritanopia (blue-blind)

#006279

Achromatopsia (no color)

#545454

Design tokens & code

CSS

--color: #3f44bb;
/* rgb */ color: rgb(63, 68, 187);
/* oklch */ color: oklch(45.9% 0.183 274.7);

Tailwind

colors: {
  custom: {
    50: '#8378d0',
    500: '#3f44bb',
    950: '#000000',
  },
}

SCSS

$custom: #3f44bb;
$custom-light: #8378d0;
$custom-dark: #000000;

JSON

{
  "hex": "#3f44bb",
  "rgb": {
    "r": 63,
    "g": 68,
    "b": 187
  },
  "hsl": {
    "h": 237.581,
    "s": 49.6,
    "l": 49.02
  },
  "oklch": {
    "l": 0.45905,
    "c": 0.18329,
    "h": 274.7
  },
  "luminance": 0.08779
}

Semantic roles & 50–950 ramp

primary

#3F44BB

secondary

#C8C68E

accent

#D44FD9

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0C0914

muted

#7D7B82

Preview Lab

Preview with #3F44BB

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

Preview Lab → · Contrast checker → · Palette generator →