Oxicolor

Theme based on Colorbit, Oxygen and Air, and other derived themes, with full color scheme / system colors support, the panel and the desktop widgets have been decorated with a nice gradient and a bezel in the borders. It's highly recommended to enable the blur effect (if not enabled by default) for this theme.This theme supports adaptive and opaque panel modes, and it has light and dark variants. Light variant improves the visibility of the gradient and the bezel when the panel is set in opaque Source: https://www.opendesktop.org/p/2355604