Example Gantt Diagram:
@startgantt [Activity1] lasts 5 days [Activity2] lasts 5 days [Activity1] is colored in White/Red [Activity2] is colored in Silver/SeaGreen [Activity1] -> [Activity2] @endgantt
Example Sequence Diagram:
@startuml actor Bob #Red/Yellow actor Alice #FF0000/FFFF00 Alice -> Bob : hello @enduml
Also see: skinparam
So a new feature has been added to print all those colors using a special diagram description:
It is also possible to print a palette of colors close to some other color (using its name or HEX value).