I like the brighter color options in the previous version. The new version is muted. Though some colors are nice muted, I prefer the other selection group.
Austin J commented
The new pastel color scheme is extremely offensive and entirely unusable as there is insufficient contrast.
It is imperative that the user be provided a way to alter any colonization.
Offensive color persists - either make them user settable or remove them.
Recently, the ribbon in the web Outlook has changed to a really garish yellow. Going to settings and selecting blue only affects the alert icon - the rest of the ribbon remains yellow.
The colors that are used to categorize events on the calendar are much better in the older version