#3F54BA#3F54BA

#3F54BA is a mid, vivid blue. Relative luminance 0.109; OKLCH L 48.8% C 0.162 H 270.5°. Best body text is #FFFFFF at 6.59:1 contrast (WCAG AA passes).

Color values

HEX	#3F54BA
RGB	rgb(63, 84, 186)
HSL	hsl(230, 49%, 49%)
HSV	hsv(230, 66%, 73%)
CMYK	cmyk(66.1%, 54.8%, 0%, 27.1%)
CIE-LAB	lab(39.48, 25.42, -56.36)
CIE-LCH	lch(39.48, 61.83, 294.27°)
OKLab	oklab(48.8% 0.0014 -0.162)
OKLCH	oklch(48.8% 0.162 270.5)
XYZ	xyz(14.0801, 10.9413, 47.8147)
Luminance	0.1094 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F54BA #BAA53F

analogous

#3F92BA #3F54BA #683FBA

triadic

#3F54BA #BA3F54 #54BA3F

tetradic

#3F54BA #BA3F92 #BAA53F #3FBA68

square

#3F54BA #BA3F92 #BAA53F #3FBA68

split-complementary

#3F54BA #BA683F #92BA3F

monochromatic

#202B5F #303F8C #3F54BA #6A7BCC #97A3DC

Accessibility & contrast

On white

6.59

#3F54BA on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.19

#3F54BA on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F54BA

6.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F54BA	#FFFFFF	#000000	##FFFFFF
##3F54BA	1.00	6.59	3.19	6.59
#FFFFFF	6.59	1.00	21.00	1.00
#000000	3.19	21.00	1.00	21.00
##FFFFFF	6.59	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0163BE

Deuteranopia (green-blind)

#0058B8

Tritanopia (blue-blind)

#006C7F

Achromatopsia (no color)

#5D5D5D

Design tokens & code

CSS

--color: #3f54ba;
/* rgb */ color: rgb(63, 84, 186);
/* oklch */ color: oklch(48.8% 0.162 270.5);

Tailwind

colors: {
  custom: {
    50: '#8283cf',
    500: '#3f54ba',
    950: '#000000',
  },
}

SCSS

$custom: #3f54ba;
$custom-light: #8283cf;
$custom-dark: #000000;

JSON

{
  "hex": "#3f54ba",
  "rgb": {
    "r": 63,
    "g": 84,
    "b": 186
  },
  "hsl": {
    "h": 229.756,
    "s": 49.398,
    "l": 48.824
  },
  "oklch": {
    "l": 0.48795,
    "c": 0.16202,
    "h": 270.5
  },
  "luminance": 0.10943
}

Semantic roles & 50–950 ramp

primary

#3F54BA

secondary

#C8BE8D

accent

#C14FD9

background

#F8F8FC

surface

#F0EFF9

border

#CBCAD2

text

#0C0A14

muted

#7D7C82

Preview Lab

Preview with #3F54BA

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

Preview Lab → · Contrast checker → · Palette generator →