$20\mathrm{.}5\mathrm{.}2$: Complete the method that looks up a color name and returns the color code.

$597714\mathrm{.}2988516.$qx$3$zqy$7$

You are given a map with color names and codes, such as:

$\{$ "red" $->"$#FF$0000",$ "tomato" $->"$#FF$6347",...\}$

Complete the method below that, given any string and such a map, looks up the color code, or returns the original string if it is not a key of the map.