Pop Art Affect

To do this in Gimp, I selected a picture with a white background. I then went to colorize in the Color Tab and changed my saturation to 100 and had the my Lightness was at 16%. Then Going to the same tab i choice Threshold, turning the pic to black and white, and changing the default to what I liked. After this add a Quick mask, giving a red shade over the picture. Taking the paint brush choosing white and whited out the face. Remove the Quick Mask, this gives u the "marching ants". then Added a New Layer leave it as the default settings and in transpartent, then change the mode of the new layer to Multiply. Then Choose your Paint Bucket choose the color you want for the background then say ok then hit Crtl+ i this allows u to paint outside the the "Marching ants"; once your done hit Crtl+ a. And Your DONE!