After Clicking on Choose Color there should be a way for canceling

[snowparrot]

After I clicked on "Choose Color" - Button there is no way of canceling it ( Or it isn't written anywhere).

[RonnyDo]

Yes, it can be cancelled by pressing ESC. Since It isn't documented anywhere this is a valid issue.
I'll probably gonna document it in the about-section, once there is one. I won't like to display a message like "press ESC to cancel" or somewhat, because native apps, like screenshot, display it neither. Thanks for the report!

[snowparrot]

@RonnyDo I would like to add Right Click for Canceling.

[RonnyDo]

@snowparrot could you may provide an example where the right button is used to cancel a dialog. That wouldn't be intuitive for most of the users IMHO. But thanks anyway!

[snowparrot]

I suppose in Computer Games. It was the first reaction in my mind to cancel this kind of interaction.

[RonnyDo]

Since I can't see that it would distract the usability somehow and it's actually quite simple to implement, I'm going to implement it. Thanks for sharing the idea!