Using this code
https://pastebin.com/0BmKdXzH
and the appropriate lang file, all custom combs appear completely black on servers with invalid.name as the name. When placed into a centrifuge, the combs still remain in your inventory as ghost items until you close the inventory screen. They still function normally otherwise, and do not have the color/name issue in JEI.
This only happens on multiplayer servers and not single player. Single player custom combs work perfectly.

https://cdn.discordapp.com/attachments/426972923732164620/433480767046418435/2018-04-10_21.57.04.png