How to highlight a region when hovering in Yandex.Maps?

Question

css

Tell me please. I made a map using Yandex.Maps, colored all the regions by color and made a tooltip display when you hover over the mouse.
Now I need to remove all the "colors" from the map and just highlight in orange each region (which is now by color) jsbin.com/cefuyopeta/edit?html ,output on hover.
Tell me what you need to use so that the colors painted appear only when hovering with the mouse, for example.

Answer 1

jsbin.com/wimetineke/1/edit?html,output _

Answer 2

You need to make the regions transparent and hang a mouseenter event on each region, in which you need to change the color of the region from transparent to whatever you want.