This is the 15096th most frequent Russian word.
покрасили
"Painted" or "colored."
In this sentence, 'покрасили' refers to the action of painting, emphasizing the result of having the walls painted.
Они покрасили стены в комнате.
They painted the walls in the room.
Here, 'покрасили' is used metaphorically to describe the bright colors of the trees as if they were painted.
После дождей деревья будто покрасили в яркие цвета.
After the rains, the trees seemed to be painted in bright colors.
In this sentence, 'покрасили' is used to indicate the action of painting the bench to renew its appearance.