Change calendar colors


I'm looking to change calendar colors on a 7.5 on-demand instance.

I found those posts on the Dev Blog, but it's 2012-2013 stuff and it's not upgrade safe. Plus not possible on a on-demand instance.

Colorizing The Calendar « Sugar Developer Portal – SugarCRM

SugarCRM: Change color of Meetings in Calendar according to Assigned User | johndope NOTES

I want to know if there is something new about that in Sugar 7.x? Anything we can do with a manifest ?