when using a stroke a new color gets added to "recently used colors" in the advanced color selector and the popup, but this isnt the case if you use the fill function (in the menu or via shorctut.) the fill tool does do this.
Probably a missing check...
Git commit 80647e8b318aeab5c39be56d53136d9a1b47bb88 by Sven Langkamp. Committed on 07/10/2018 at 10:33. Pushed by langkamp into branch 'master'. Update color history after fill M +2 -0 libs/ui/actions/kis_selection_action_factories.cpp https://commits.kde.org/krita/80647e8b318aeab5c39be56d53136d9a1b47bb88
Git commit a00fa257e48b10139dea5601cb989a6802caf0da by Boudewijn Rempt, on behalf of Sven Langkamp. Committed on 10/10/2018 at 07:40. Pushed by rempt into branch 'krita/4.1'. Update color history after fill (cherry picked from commit 80647e8b318aeab5c39be56d53136d9a1b47bb88) M +2 -0 libs/ui/actions/kis_selection_action_factories.cpp https://commits.kde.org/krita/a00fa257e48b10139dea5601cb989a6802caf0da