https://www.reddit.com/r/kdenlive/comments/1i15jw4/a_puzzle_to_solve_re_washedout_colors_on_some/ Thanks.
Thank you for reporting. If you don't mind, I updated the bug title. If it's a 10bit HDR clip (as “berndmj” mentioned) then yes Kdenlive can't handle it proper. What you can try is Kdenlive master that should have 10bit color deep: https://cdn.kde.org/ci-builds/multimedia/kdenlive/master/windows/ Otherwise follow the steps "egorechek" mentioned on the reddit.