棕褐色

His teeth were a gleaming flash of white against his tan.

他的牙齿在他棕褐的映衬下白得发亮。

In lamina of shale which deposited in deep lake away from paleo-debouchment in the Shahejie Formation in the Jiyang Depression, some aeolian silty sand was discovered.

该油页岩呈深灰或棕褐 ,页理发育 ,主要富含有机质层和浅灰钙质层形成的毫米级沉积层偶组成。