The color that is used to fill the area behind the image. If the use-background-color key is not set, the color is determined by the active GTK+ theme instead.
An dath a thèid a chleachdadh gus an raon air cùlaibh an deilbh a lìonadh. Mur deach an iuchair use-background-color a shuidheachadh, bidh an dath a-rèir an ùrlair GTK+ ghnìomhaich.