In this coloring page, the focus is on a man with dark brown hair who has a mustache and is wearing a green shirt with a blue tie. He is intently looking at a computer screen. To bring this character to life, you can try adding shades to the man's hair and facial features to give them more depth and realism. The green shirt and blue tie could be set off with a variety of colors - try adding a muted yellow or light pink to give the shirt a bit of detail and to contrast with the blue tie. You could use a variety of bold, bright colors to make the computer screen more interesting, such as shades of red, orange, and purple. Finally, use delicate shading to fill in the backdrop of the scene. This could range from blues to grays to a hint of yellow. With careful coloring, this drawing can come to life in a unique way.