There is not much difference in price between the KMC X10.93 and X11.93. Lots of ebay sellers who sell bulk chain from a large roll who still have the old color chain. 11-speed is $21.50 for 116 links and just a little more for the one that is boxed. 10-speed is from $15-$20 in bulk and boxed right at $20 with either color available. Prices include shipping.
Examples:
bulk 10-sp 116 links $19.65
https://www.ebay.com/itm/KMC-X10-93-...frcectupt=true
OEM packaging $19.94
https://www.ebay.com/itm/KMC-X10-93-...S!-1:rk:6:pf:0
11 speed bulk, 114 links $21.50
https://www.ebay.com/itm/KMC-X11-93-...frcectupt=true
11 speed packaged 116 links $21.75
https://www.ebay.com/itm/KMC-X11-93-...AVr:rk:11:pf:0