Currently, when titles do not have an included Screenshot, the highlighted backdrop of the page displays a green background color. While I'm sure this is intentional in order to entice users to always be sure to add one, there isn't really anything that communicates this is what caused the green background. Further from an aesthetic point of view, it highly clashes with the purple "theme" of Twitch/IGDB.

As a suggestion, Twitch channels that don't include a background image will display a repeating pattern of the user's name. Or, an icon to signify a broken image to tell users to add a screenshot would also be helpful.