an old icon theme once made for xfce, also keep in mind that it was based on a fixed color palette!
國旗俄羅斯
48px、flag、icons、inkscape、rodentia_icons、russia、symbol、tricolor、upload2openclipart
48像素、旗、圖標、Inkscape中、rodentia_icons、俄國、符號、三色、upload2openclipart
資料來源：openclipart ( https://openclipart.org/ )