A girl in a swimsuit on the background of the beachA girl in a swimsuit on the background of the beach
A tree with yellow leaves between a stone shore and clear blue-green water against a blue sky backgroundA tree with yellow leaves between a stone shore and clear blue-green water against a blue sky background
Landscape coniferous trees on the background of mountains in winterLandscape coniferous trees on the background of mountains in winter
Основной цвет, тон, на к-ром пишется картина. Задний план картины. Общие условия, обстановка, где что-н. происходит ( книжн. ). Единица степени громкости.