Daredevil Red
Here is something that I didn't specifically color, since it is just a sheet of red behind Daredevil, but it is an example of how coloring can really help enhance the mood of a picture.
This was done digitally on MediBang Paint, but unlike the previous posts, this picture is more of an exercise of how to utilize the gestalt images and let the shadows define Daredevil's figure. As great as the image would look in black and white, the red really gives the picture a different feeling. One thing, it is appropriate for the character since Daredevil's costume is red, but it also makes the mood of it seem so solemn and maybe even a hint of violence.