Per event colours are displayed on central.aegee.org, in Evolution, and can be displayed on Android with DAVx⁵.
The OMS calendar at cal.aegee.org is an example for using colours. Each event there has a category. For each category a distinct colour is used.
When 🕔︎Thursday, January 13, 2022 at 17:00 - 22:00 GMT+2
Created on Thursday, January 13, 2022 at 08:47:18 GMT+2
Last modified on Friday, January 14, 2022 at 08:53:39 GMT+2
Link to calendar https://central.aegee.org/?d=2022-01-13&id=a5952b642367feab18112de6c7951e39a9473c860&cal=2
💾︎iCalendar file https://central.aegee.org/c/2/5952b642367feab18112de6c7951e39a9473c860.ics