#3664CC#3664CC

#3664CC is a mid, vivid blue. Relative luminance 0.143; OKLCH L 52.9% C 0.169 H 263.7°. Best body text is #FFFFFF at 5.45:1 contrast (WCAG AA passes).

Color values

HEX#3664CC
RGBrgb(54, 100, 204)
HSLhsl(222, 60%, 51%)
HSVhsv(222, 74%, 80%)
CMYKcmyk(73.5%, 51%, 0%, 20%)
CIE-LABlab(44.60, 20.37, -58.55)
CIE-LCHlch(44.60, 61.99, 289.18°)
OKLaboklab(52.95% -0.0187 -0.1684)
OKLCHoklch(52.95% 0.169 263.7)
XYZxyz(16.9737, 14.2564, 58.9722)
Luminance0.1426 (WCAG relative)
Temperaturecool
Familyblue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#3664CC #CC9E36
analogous
#36AFCC #3664CC #5336CC
triadic
#3664CC #CC3664 #64CC36
tetradic
#3664CC #CC36AF #CC9E36 #36CC53
square
#3664CC #CC36AF #CC9E36 #36CC53
split-complementary
#3664CC #CC5336 #AFCC36
monochromatic
#1B346C #284C9D #3664CC #678AD8 #98AFE5

Accessibility & contrast

On white

5.45
#3664CC on #FFFFFF
AA ✓AA large ✓AAA ✗

On black

3.85
#3664CC on #000000
AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3664CC
5.45:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##3664CC#FFFFFF#000000##FFFFFF
##3664CC1.005.453.855.45
#FFFFFF5.451.0021.001.00
#0000003.8521.001.0021.00
##FFFFFF5.451.0021.001.00

Color blindness preview

Protanopia (red-blind)
#2271D0
Deuteranopia (green-blind)
#0063CA
Tritanopia (blue-blind)
#007D8E
Achromatopsia (no color)
#696969

Design tokens & code

CSS
--color: #3664cc;
/* rgb */ color: rgb(54, 100, 204);
/* oklch */ color: oklch(52.9% 0.169 263.7);
Tailwind
colors: {
  custom: {
    50: '#818fdc',
    500: '#3664cc',
    950: '#000000',
  },
}
SCSS
$custom: #3664cc;
$custom-light: #818fdc;
$custom-dark: #000000;
JSON
{
  "hex": "#3664cc",
  "rgb": {
    "r": 54,
    "g": 100,
    "b": 204
  },
  "hsl": {
    "h": 221.6,
    "s": 59.524,
    "l": 50.588
  },
  "oklch": {
    "l": 0.5295,
    "c": 0.16941,
    "h": 263.7
  },
  "luminance": 0.14258
}

Semantic roles & 50–950 ramp

primary
#3664CC
secondary
#D0BC8E
accent
#B245E3
background
#F8F8FD
surface
#F0F0FB
border
#CBCBD4
text
#0C0C15
muted
#7D7D83

Preview Lab

Preview with #3664CC

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

Preview Lab → · Contrast checker → · Palette generator →

#3664CC Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva