What color is Drawing, Haus Heiligenstädterstr. (Façade Elevation) ?

Source Crayola® CSS3 CSS4
#4b5278
 
#58427c
cyber grape
#483d8b
dark slate blue
#483d8b
darkslateblue
#686e8c
 
#757575
sonic silver
#708090
slate gray
#708090
slategrey
#848699
 
#95918c
gray
#778899
light slate grey
#778899
lightslategrey