#3663D2#3663D2

#3663D2 is a mid, vivid blue. Relative luminance 0.144; OKLCH L 53.2% C 0.179 H 264.4°. Best body text is #FFFFFF at 5.42:1 contrast (WCAG AA passes).

Color values

HEX	#3663D2
RGB	rgb(54, 99, 210)
HSL	hsl(223, 63%, 52%)
HSV	hsv(223, 74%, 82%)
CMYK	cmyk(74.3%, 52.9%, 0%, 17.6%)
CIE-LAB	lab(44.74, 23.23, -61.75)
CIE-LCH	lch(44.74, 65.98, 290.61°)
OKLab	oklab(53.19% -0.0173 -0.1778)
OKLCH	oklch(53.19% 0.179 264.4)
XYZ	xyz(17.6119, 14.3592, 62.8037)
Luminance	0.1436 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3663D2 #D2A536

analogous

#36B1D2 #3663D2 #5736D2

triadic

#3663D2 #D23663 #63D236

tetradic

#3663D2 #D236B1 #D2A536 #36D257

square

#3663D2 #D236B1 #D2A536 #36D257

split-complementary

#3663D2 #D25736 #B1D236

monochromatic

#1A3474 #254AA6 #3663D2 #688ADD #9AB1E8

Accessibility & contrast

On white

5.42

#3663D2 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.87

#3663D2 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3663D2

5.42:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3663D2	#FFFFFF	#000000	##FFFFFF
##3663D2	1.00	5.42	3.87	5.42
#FFFFFF	5.42	1.00	21.00	1.00
#000000	3.87	21.00	1.00	21.00
##FFFFFF	5.42	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0F71D6

Deuteranopia (green-blind)

#0063D0

Tritanopia (blue-blind)

#007E91

Achromatopsia (no color)

#6A6A6A

Design tokens & code

CSS

--color: #3663d2;
/* rgb */ color: rgb(54, 99, 210);
/* oklch */ color: oklch(53.2% 0.179 264.4);

Tailwind

colors: {
  custom: {
    50: '#828ee1',
    500: '#3663d2',
    950: '#000000',
  },
}

SCSS

$custom: #3663d2;
$custom-light: #828ee1;
$custom-dark: #000000;

JSON

{
  "hex": "#3663d2",
  "rgb": {
    "r": 54,
    "g": 99,
    "b": 210
  },
  "hsl": {
    "h": 222.692,
    "s": 63.415,
    "l": 51.765
  },
  "oklch": {
    "l": 0.53192,
    "c": 0.17867,
    "h": 264.4
  },
  "luminance": 0.14361
}

Semantic roles & 50–950 ramp

primary

#3663D2

secondary

#D4C090

accent

#B741E6

background

#F8F8FD

surface

#F0F0FB

border

#CBCBD4

text

#0C0C15

muted

#7D7D83

Preview Lab

Preview with #3663D2

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

Preview Lab → · Contrast checker → · Palette generator →