But the standard that made Cyr famous was "school bus yellow ... Solomon says that red colors are not only far less visible during the day (see the chart above), but they virtually disappear ...

The yolky exterior color, called National School Bus Glossy Yellow, has remained the go-to shade since 1939. Buses are ...

School buses have an enviable safety record, thanks in part to their bright yellow color. David L. Ryan/The Boston Globe via Getty Images ...