Information about #646F8B color

#646F8B color image

Basic facts about this digital color

The digital color #646F8B is classified in the Register under the Azure Color Family, with Low Saturation and Light brightness. Its exact recipe is rgb(100, 111, 139) — 39.2% red, 43.5% green, 54.5% blue — and for print it converts to CMYK 15 / 11 / 0 / 45. Curious how these numbers work? Read our RGB color codes guide.

#646F8B presents itself as a calm, restrained steel-blue azure — one that sits on the lighter side of the spectrum. It is a natural fit for understated, calm designs that favor harmony over drama. In The Official Register of Color Names it is practically indistinguishable from Elevate (#60768B). Nearby in the Register you will also find Weathered Blue (#677583) and Waikawa Grey (#5B6E91).

The recipe behind #646F8B is rgb(100, 111, 139), with blue as the dominant ingredient. If you plan to put text on a #646F8B background, choose white — the contrast ratio is 5.0:1 (passing WCAG AA), while black manages only 4.2:1. #646F8B has no official name yet. If this shade means something to you, you can be the one to name it.

#646F8B color variations

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

#646F8B 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 #646F8B

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

Elevate color link
Elevate

#60768B

Waikawa Grey color link
Waikawa Grey

#5B6E91

Mist Blue color link
Mist Blue

#646D7E

Kashmir Blue color link
Kashmir Blue

#576D8E

Jet Gray color link
Jet Gray

#616D7E

Blue Grey color link
Blue Grey

#607C8E

Escapade color link
Escapade

#667C91

Lynch color link
Lynch

#697D89

Blue Bayoux color link
Blue Bayoux

#62777E

Waratah color link
Waratah

#55698B

Conversions between color systems and etc.

  • HEX#646F8B
  • RGB100, 111, 139
  • CMYK15, 11, 0, 45
  • CSSrgb(100, 111, 139)
  • HSL223°, 16%, 47%
  • HSL Precise223.077°, 16.318%, 46.863%
  • HSV223°, 28%, 55%
  • HSB223°, 28%, 55%
  • Normalized R (0.0–1.0)0.392
  • Normalized G (0.0–1.0)0.435
  • Normalized B (0.0–1.0)0.545
  • GLSLvec3(0.392, 0.435, 0.545)
  • GLSL with alphavec4(0.392, 0.435, 0.545, 1.000)
  • HLSL / Metalfloat3(0.392, 0.435, 0.545)
  • Percentage of Red in RGB39.2%
  • Percentage of Green in RGB43.5%
  • Percentage of Blue in RGB54.5%
  • Color FamilyAzure
  • Saturation FamilyLow Saturation
  • Lightness FamilyLight
  • HEX ID646F8B
  • DECIMAL ID6582155
  • Name LengthThis color has no name
  • Seen by search & AI crawlers5 times
  • Counting from2025-01-01