In a map routing application, what colors should the start and end point have?

green for start, red for finish.

1. What color are routes on a map?
2. What is yellow colour and brown colour in map used for?
3. How many colors should be on a map?

What color are routes on a map?

If you see gray or blue lines on the map, these lines are your directions routes.

What is yellow colour and brown colour in map used for?

Various colours are used for the same purpose. For example, generally, blue is used for showing water bodies, brown for mountains, yellow for plateaus and green is used for plains.

How many colors should be on a map?

The four-color theorem states that any map in a plane can be colored using four-colors in such a way that regions sharing a common boundary (other than a single point) do not share the same color.