The yellow is a stark contrast to the black/grey especially at night or poor driving conditions i.e. fog and snow - In some countries they use white which can "disappear" in poor condition yet use the yellow to mark restricted stopping and parking
The best colors to use to color a map are blue and green. Blue is for the bodies of water. Green for land. You can really use any colors that you want to, but those are the most common colors.
no, but yellow is. classic colors are red, blue, and yellow. classic colors are colors that people use to mix to make new colors. Gold is made by mixing yellow and silver.
Red and Green.
If you are mixing pigment, then you'd use yellow and red.
For the same reason they use all the other colors.
Yellow pink
red&yellow
yellow
yellow
look at a color wheel and use colors opposite your color (Yellow). Colors that would go with yellow would be reds, violets, and blues.
Blue is a primary color, one of the colors you use to build others. You can not mix other colors to achieve blue (or red or yellow).
Red and yellow will give you orange.