Information about #3666BF color

#3666BF color image

Basic facts about this digital color

The digital color #3666BF is classified in the Register under the Azure Color Family, with Moderate Saturation and Light brightness. In numbers: rgb(54, 102, 191) (21.2% red, 40% green, 74.9% blue), or CMYK 54 / 35 / 0 / 25 for print. New to color codes? See our guide to RGB color codes.

The color #3666BF reads as a pleasantly vivid sky-leaning azure and sits on the lighter side of the spectrum. Designers typically reach for tones like this for understated, calm designs that favor harmony over drama. In The Official Register of Color Names it is very close to True Blue (#2D68C4). Nearby in the Register you will also find Onetta Blue (#4070B8) and Flat Medium Blue (#3A5FCD).

Technically, the mix leans on its blue channel (rgb(54, 102, 191)), which gives #3666BF its character. If you plan to put text on a #3666BF background, choose white — the contrast ratio is 5.5:1 (passing WCAG AA), while black manages only 3.8:1. Out of 16,777,216 possible colors, #3666BF is still unnamed — it can be claimed and named in The Official Register of Color Names.

#3666BF color variations

View this color variations of tints, shades, tones and hues.

#3666BF color harmonies

Color harmonies are pleasing color schemes created according to their position on a color wheel.

Complementary

Complementary color schemes are made by picking two opposite colors con the color wheel. They appear vibrant near to each other.

Complementary color schemes

Split complementary

Split complementary schemes are like complementary but they uses two adiacent colors of the complement. They are more flexible than complementary ones.

Split complementary color scheme

Analogous

Analogous color schemes are made by picking three colors that are next to each other on the color wheel. They are perceived as calm and serene.

Analogous color scheme

Triadic

Triadic color schemes are created by picking three colors equally spaced on the color wheel. They appear quite contrasted and multicolored.

Triadic color scheme

Tetradic

Tetradic color schemes are made form two couples of complementary colors in a rectangular shape on the color wheel.

Tetradic color scheme

Square

Square color schemes are like tetradic arranged in a square instead of rectangle. Colors appear even more contrasting.

Square color scheme

Nearest named colors to #3666BF

The closest officially registered color names in the Register, ordered by similarity — your shade’s neighborhood is already being claimed.

True Blue color link
True Blue

#2D68C4

Onetta Blue color link
Onetta Blue

#4070B8

Kasper Blue color link
Kasper Blue

#4072B7

Mid Blue color link
Mid Blue

#276AB3

Mariner color link
Mariner

#286ACD

Bluish color link
Bluish

#2976BB

Han Blue color link
Han Blue

#446CCF

Quantum color link
Quantum

#4A6CB4

Celtic Blue color link
Celtic Blue

#246BCE

Skydiver color link
Skydiver

#4677C8

#3666BF color backgrounds & wallpapers

Download color wallpaper / background for your Desktop PC, Tablet or Mobile phone.

Conversions between color systems and etc.

  • HEX#3666BF
  • RGB54, 102, 191
  • CMYK54, 35, 0, 25
  • CSSrgb(54, 102, 191)
  • HSL219°, 56%, 48%
  • HSL Precise218.978°, 55.918%, 48.039%
  • HSV219°, 72%, 75%
  • HSB219°, 72%, 75%
  • Normalized R (0.0–1.0)0.212
  • Normalized G (0.0–1.0)0.400
  • Normalized B (0.0–1.0)0.749
  • GLSLvec3(0.212, 0.400, 0.749)
  • GLSL with alphavec4(0.212, 0.400, 0.749, 1.000)
  • HLSL / Metalfloat3(0.212, 0.400, 0.749)
  • Percentage of Red in RGB21.2%
  • Percentage of Green in RGB40%
  • Percentage of Blue in RGB74.9%
  • Color Family (Hue)Azure
  • Saturation FamilyModerate Saturation
  • Lightness FamilyLight
  • HEX ID3666BF
  • DECIMAL ID3565247
  • Name LengthThis color has no name
  • This page visited6 times
  • Counting from2025-01-01