docs: adding highlight to example keywords

subjects/ascii-art/color/README.md

@@ -22,7 +22,7 @@ EX: go run . --color=<color> <substring to be colored> "something"
 $ go run . --color=red kit "a king kitten have kit"
 ```
 
-For the example above, the substring kit in the word kitten and the word kit at the end should be colored.
+For the example above, the substring `kit` in the word `kitten` and the word `kit` at the end should be colored.
 
 If there are other `ascii-art` optional projects implemented, the program should accept other correctly formatted `[OPTION]` and/or `[BANNER]`.
 Additionally, the program must still be able to run with a single `[STRING]` argument.