#3663BA#3663BA

#3663BA is a mid, vivid blue. Relative luminance 0.133; OKLCH L 51.5% C 0.146 H 262.0°. Best body text is #FFFFFF at 5.75:1 contrast (WCAG AA passes).

Color values

HEX	#3663BA
RGB	rgb(54, 99, 186)
HSL	hsl(220, 55%, 47%)
HSV	hsv(220, 71%, 73%)
CMYK	cmyk(71%, 46.8%, 0%, 27.1%)
CIE-LAB	lab(43.14, 14.34, -50.48)
CIE-LCH	lch(43.14, 52.48, 285.86°)
OKLab	oklab(51.46% -0.0203 -0.1447)
OKLCH	oklch(51.46% 0.146 262)
XYZ	xyz(14.8429, 13.2516, 48.2204)
Luminance	0.1325 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3663BA #BA8D36

analogous

#36A5BA #3663BA #4B36BA

triadic

#3663BA #BA3663 #63BA36

tetradic

#3663BA #BA36A5 #BA8D36 #36BA4B

square

#3663BA #BA36A5 #BA8D36 #36BA4B

split-complementary

#3663BA #BA4B36 #A5BA36

monochromatic

#1A315B #284A8B #3663BA #5D84D0 #8DA8DE

Accessibility & contrast

On white

5.75

#3663BA on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.65

#3663BA on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3663BA

5.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3663BA	#FFFFFF	#000000	##FFFFFF
##3663BA	1.00	5.75	3.65	5.75
#FFFFFF	5.75	1.00	21.00	1.00
#000000	3.65	21.00	1.00	21.00
##FFFFFF	5.75	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#366CBD

Deuteranopia (green-blind)

#1860B8

Tritanopia (blue-blind)

#007785

Achromatopsia (no color)

#666666

Design tokens & code

CSS

--color: #3663ba;
/* rgb */ color: rgb(54, 99, 186);
/* oklch */ color: oklch(51.5% 0.146 262.0);

Tailwind

colors: {
  custom: {
    50: '#7d8ecf',
    500: '#3663ba',
    950: '#000000',
  },
}

SCSS

$custom: #3663ba;
$custom-light: #7d8ecf;
$custom-dark: #000000;

JSON

{
  "hex": "#3663ba",
  "rgb": {
    "r": 54,
    "g": 99,
    "b": 186
  },
  "hsl": {
    "h": 219.545,
    "s": 55,
    "l": 47.059
  },
  "oklch": {
    "l": 0.51457,
    "c": 0.14607,
    "h": 262
  },
  "luminance": 0.13253
}

Semantic roles & 50–950 ramp

primary

#3663BA

secondary

#C8B184

accent

#AC49DE

background

#F8F8FC

surface

#EFF0F9

border

#CACBD2

text

#0B0C14

muted

#7C7D82

Preview Lab

Preview with #3663BA

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

Preview Lab → · Contrast checker → · Palette generator →