Hi, I don't own any treefrogs but I do know what redleg looks like. A picture will help a lot, and it may not be your computer acting up. That photo uploader on the site hasn't worked now for a long time so you have to upload to a site like photobucket or imugr then copy and paste from there. But to be honest if your frog is acting normal he is probably fine, the subtle pink colour could be just from rubbing against the branches, glass or other things that are in the terrarium/viv.