Android: Ability to set different colors for birthday events in different linked Outlook accounts, where the age is also visible

Consider 2 Outlook account linked to OneCalendar, acc1 with relatives birthdays included, acc2 with friends birthdays included. Like a simple event can be set a different color for the birthdays event, but there in list view mode we can't see the age. If we enable the birthdays then all birthdays can be seen with ages, but can not be set a different color for acc1 and acc2. So, the main ideea is to see birthdays with ages from acc1 and acc2 but with possibility to set a different color for acc1 birthdays and for acc2 birthdays. Thanx