However, these colors are not mentioned by law, but they are the national colors in an informal and substantial practice. Blue and white colors decorates many flags, symbols, etc. Eg: Blue-White (Blau-Weiss)[2] Zionist youth moment in Germany and Blue and white (He) patriotic song.[3] Book of Numbers mentions in 15:38, it says that the Israelites were commanded to put fringes on the corners of their garments, and to put a cord of blue border upon these fringes.