In general, interfaces should use simple geometric forms, minimal contours, and a restricted color palette comprised primarily of less-saturated or neutral colors balanced with a few high-contrast accent colors that emphasize important information.

• 一般说来，界面应该使用简单的几何形状和最小的轮廓。 颜色的数量要严格限制，并且应该以较为不饱和的颜色或者中性颜色为主，可以适当加入一些高对比作为强调重要信息的颜色。