The closest color to #5c6ea4 in the CSS4 color palette is slategrey which in robot-speak is #708090  
Or perhaps you'd like to see the intersection between this color and Crayola® or CSS3 palettes?
  • This object is part of the Textiles collection.
  • There are 36 images of this object.
  • Plate, ca. 1750
  • porcelain.
  • Museum purchase through gift of Georgiana L. McClellan.
  • 1957-15-1
  • This object is part of the Textiles collection.
  • There are 2 images of this object.
  • Textile (England), 1760–80
  • Medium: cotton Technique: printed by engraved copper plate on plain weave....
  • Museum purchase from Au Panier Fleuri Fund.
  • 1960-55-1