Rotohail's "Reclusive" SketchBook

[Fedodika]

Sure bro, most of what i did here was take a colorize layer with blue and just knocked down the saturation. It makes things grayer, which looks less jarring. You dont need overblown colors to appeal to a cartoon market, 

https://www.artstation.com/blueitems

This is a fine example, looks fun and kid friendly but the colors are dialed back, good shape and value carries the design. Also try to isolate the silhouette more, since your figures are dark, use that wisely to sculpt the background with lighter tones so they read better