#3F46BB#3F46BB

#3F46BB is a mid, vivid blue. Relative luminance 0.090; OKLCH L 46.3% C 0.181 H 274.2°. Best body text is #FFFFFF at 7.49:1 contrast (WCAG AA passes).

Color values

HEX	#3F46BB
RGB	rgb(63, 70, 187)
HSL	hsl(237, 50%, 49%)
HSV	hsv(237, 66%, 73%)
CMYK	cmyk(66.3%, 62.6%, 0%, 26.7%)
CIE-LAB	lab(36.03, 34.71, -62.56)
CIE-LCH	lch(36.03, 71.54, 299.02°)
OKLab	oklab(46.26% 0.0134 -0.1804)
OKLCH	oklch(46.26% 0.181 274.2)
XYZ	xyz(13.2067, 9.0238, 48.0499)
Luminance	0.0902 (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

#3F46BB #BBB43F

analogous

#3F84BB #3F46BB #763FBB

triadic

#3F46BB #BB3F46 #46BB3F

tetradic

#3F46BB #BB3F84 #BBB43F #3FBB76

square

#3F46BB #BB3F84 #BBB43F #3FBB76

split-complementary

#3F46BB #BB763F #84BB3F

monochromatic

#20245F #30358D #3F46BB #6A70CD #989CDC

Accessibility & contrast

On white

7.49

#3F46BB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.81

#3F46BB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F46BB

7.49:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F46BB	#FFFFFF	#000000	##FFFFFF
##3F46BB	1.00	7.49	2.81	7.49
#FFFFFF	7.49	1.00	21.00	1.00
#000000	2.81	21.00	1.00	21.00
##FFFFFF	7.49	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005ABF

Deuteranopia (green-blind)

#004FB9

Tritanopia (blue-blind)

#00647A

Achromatopsia (no color)

#555555

Design tokens & code

CSS

--color: #3f46bb;
/* rgb */ color: rgb(63, 70, 187);
/* oklch */ color: oklch(46.3% 0.181 274.2);

Tailwind

colors: {
  custom: {
    50: '#8379d0',
    500: '#3f46bb',
    950: '#000000',
  },
}

SCSS

$custom: #3f46bb;
$custom-light: #8379d0;
$custom-dark: #000000;

JSON

{
  "hex": "#3f46bb",
  "rgb": {
    "r": 63,
    "g": 70,
    "b": 187
  },
  "hsl": {
    "h": 236.613,
    "s": 49.6,
    "l": 49.02
  },
  "oklch": {
    "l": 0.46255,
    "c": 0.18087,
    "h": 274.2
  },
  "luminance": 0.09025
}

Semantic roles & 50–950 ramp

primary

#3F46BB

secondary

#C8C58E

accent

#D14FD9

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0C0914

muted

#7D7B82

Preview Lab

Preview with #3F46BB

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

Preview Lab → · Contrast checker → · Palette generator →