#3663CC#3663CC

#3663CC is a mid, vivid blue. Relative luminance 0.141; OKLCH L 52.7% C 0.171 H 264.0°. Best body text is #FFFFFF at 5.51:1 contrast (WCAG AA passes).

Color values

HEX	#3663CC
RGB	rgb(54, 99, 204)
HSL	hsl(222, 60%, 51%)
HSV	hsv(222, 74%, 80%)
CMYK	cmyk(73.5%, 51.5%, 0%, 20%)
CIE-LAB	lab(44.33, 21.01, -58.99)
CIE-LCH	lch(44.33, 62.62, 289.60°)
OKLab	oklab(52.74% -0.0179 -0.1697)
OKLCH	oklch(52.74% 0.171 264)
XYZ	xyz(16.8784, 14.0657, 58.9405)
Luminance	0.1407 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3663CC #CC9F36

analogous

#36AECC #3663CC #5436CC

triadic

#3663CC #CC3663 #63CC36

tetradic

#3663CC #CC36AE #CC9F36 #36CC54

square

#3663CC #CC36AE #CC9F36 #36CC54

split-complementary

#3663CC #CC5436 #AECC36

monochromatic

#1B346C #284B9D #3663CC #6789D8 #98AFE5

Accessibility & contrast

On white

5.51

#3663CC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.81

#3663CC on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3663CC

5.51:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3663CC	#FFFFFF	#000000	##FFFFFF
##3663CC	1.00	5.51	3.81	5.51
#FFFFFF	5.51	1.00	21.00	1.00
#000000	3.81	21.00	1.00	21.00
##FFFFFF	5.51	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1E70D0

Deuteranopia (green-blind)

#0062CA

Tritanopia (blue-blind)

#007C8E

Achromatopsia (no color)

#696969

Design tokens & code

CSS

--color: #3663cc;
/* rgb */ color: rgb(54, 99, 204);
/* oklch */ color: oklch(52.7% 0.171 264.0);

Tailwind

colors: {
  custom: {
    50: '#818edc',
    500: '#3663cc',
    950: '#000000',
  },
}

SCSS

$custom: #3663cc;
$custom-light: #818edc;
$custom-dark: #000000;

JSON

{
  "hex": "#3663cc",
  "rgb": {
    "r": 54,
    "g": 99,
    "b": 204
  },
  "hsl": {
    "h": 222,
    "s": 59.524,
    "l": 50.588
  },
  "oklch": {
    "l": 0.52743,
    "c": 0.17063,
    "h": 264
  },
  "luminance": 0.14068
}

Semantic roles & 50–950 ramp

primary

#3663CC

secondary

#D0BC8E

accent

#B345E3

background

#F8F8FD

surface

#F0F0FB

border

#CBCBD4

text

#0C0C15

muted

#7D7D83

Preview Lab

Preview with #3663CC

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

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