What color is Mihrab tile (portion of a Prayer niche) Tile ?

Source Crayola® CSS3 CSS4
#06014d
 
#000000
black
#191970
midnight blue
#191970
midnightblue
#716a63
 
#757575
sonic silver
#696969
dim grey
#696969
dimgrey
#1a2c68
 
#1a4876
midnight blue
#191970
midnight blue
#191970
midnightblue
#25203d
 
#414a4c
outer space
#2f4f4f
dark slate gray
#2f4f4f
darkslategrey
#464153
 
#414a4c
outer space
#2f4f4f
dark slate gray
#2f4f4f
darkslategrey