I would add only one more color for a specific event: "default color", which would follow the default setting of the parent calendar.

At the moment, if the event has a color different that the default, there is no way to reset it back to the default. Manual color selection works, but is not linked to the default color and the change in the value of the default color will not be reflected on that event.

Yes yes yes, definitely yes !!!

I use calendar colors "semantically", such that the color of a calendar and its events tells me something about it (type, priority, etc). The built-in colors for Proton Calendar are utterly useless to me in this regard. I also find that the pastel colors blend in the Android app's month view, making events difficult to distinguish with a quick glance. Google's colors leave a lot to be desired, but they're miles better than Proton Calendar. Until I began using Proton Calendar, I hadn't realized how much I rely on the color "semantics" to make information stand out.

I really don't understand how someone puts in the work to add calendar colors, but then nerfs the feature by hard coding just 5 basic color groups, with 4 largely indistinguishable variations of each. Just add a color wheel! If there's some sick need to hard code a limited set of colors, then use fewer variations of more base colors, pick colors with greater differences between them, and include some primaries!

The default color palatte is fine, but I don't like the color choices for some of the categories I use. The way my brain works, I need more colors and SHADES of colors to really make the calendar work the way I want it to work for ME. It works and I've grown accustomed to the LIMITED color choices, but I don't LIKE it. I want more...and I want them for the calendars *and* events.

The current day highlight is VERY subtle.

Have many more ranges of colors thant we could define in a color rainbow to choose for the calendars, as it is the case for google clanedar or infomaniak.