It's pretty disappointing that this issue still hasn't been addressed as of August 2026. Color coding is essential to usability, and frankly these color options suck. Is it really that hard to give us a color wheel? I might be stuck using Google Calendar because I just can't get these color options to work with the system I already utilize daily.

Yes please, the colors also hurt my eyes, even though I love the Proton branding, but something about 10x 30min incremental blocks in highly saturated colors doesn't work. See also the same request here: https://protonmail.uservoice.com/forums/284483-proton-mail-calendar/suggestions/48392744-expanded-color-selection

here: https://protonmail.uservoice.com/forums/284483-proton-mail-calendar/suggestions/44399010-have-many-more-color-options-for-the-calendars

and here: https://protonmail.uservoice.com/forums/284483-proton-mail-calendar/suggestions/50257224-more-colors-for-labels

(there may be more!)

Agreeing with the comment below - a colour wheel would be amazing

A colour wheel would be great!

Yes the colours are not really fresh

Having signed up for paid Proton suite, I'm hugely disappointed to discover I'm still stuck with the same limited selection of colours in calendar; I was under the impression this limitation was only applied to free accounts.

Not just 'more' colours – please include a proper colour wheel, like any other app, so users can define the colours that work for them.

Colour coding of calendars is essential to usability. It's also the only way I can manage the transition from Apple calendar to Proton; I currently have numerous calendars and have integrated a colour coding system throughout my calendars, task lists, emails, folders and document management. There is no way I'll change 15 years of colour coding because Proton doesn't include basic functionality such as colour wheel.

The absence of this feature makes the calendar unusable for me in practical terms.