.png interlaced

I'm seeing a little bit of the orange/pink hues in the very center of the pictures change slightly in the thumbnail view. Jpeg is the lightest, most blue, the Png is next with a little bit of Pink, then the Png Interlaced has pink and yellow.. if contrast is what you are looking for, I'd say the Jpeg is giving the best in thumbnails, however, full view.. Identical, no difference detectable.