校车橙黄是校车车身的特征颜色。从1939年到现在，很多美国的校车都是使用这种颜色。在美国，其正式名称是国家校车亮黄（National School Bus Glossy Yellow），而最初称为国家校车铬黄（National School Bus Chrome）。

1939年4月，在哥伦比亚大学师范学院担任教授的哲学博士弗兰克（Frank W. Cyr，黄色校车之父）组织了一个会议，讨论创建国家校车设计的标准，包括校车的黄色标准。“国家校车铬黄”从此出台。因为校车橙黄作底色，字体黑色，会更容易在早上的灰暗中看到。

School bus yellow is a color which was especially formulated for use on school buses in North America in 1939. The color is now officially known in Canada and the U.S. as National School Bus Glossy Yellow and was originally called National School Bus Chrome. The pigment used for this color was, for a long time, the lead-containing chrome yellow.