I didn't know about this feature until I looked at the source code. :$ There doesn't seem to be any mention of this in the documentation (Help, Guides).
In Draw or Impress go to Tools ⟶ Color Replacer, select any of the "Select color" control and hit the spacebar. Result: the "Color Picker" dialog appears. For me, it's a handy tool for checking the color values of bitmap graphics or shapes. Is this worth mentioning in the documentation? (Of course, at the appropriate time).
