Blue and yellow

Yellow and blue
Important colours 
for me and you!  

For those who don't know about zebra crossings they are marked on either side by these Beleisha beacons with flashing lights to warn the motorists that they must stop if a pedestrian is trying to cross the road.

"The beacons were named after Leslie Hore-Belisha (1893–1957), the Minister of Transport who, in 1934, added beacons to pedestrian crossings, marked by large metal studs in the road surface. These crossings were later painted in black and white stripes, and thus are known as zebra crossings. Legally, pedestrians have priority (over wheeled traffic) on such crossings."
Wikipedia