Turtle Colours on the Pond

My pond out back never fails to amaze me. This summer I have spotted turtles of unusual colours, one is white (solid bone white top shell) and the other is red (solid fire-engine red top shell)
I only have pictures and a video of the white turtle so far.
Stayed tuned though.
The white turtle appears orange in the video but that is because it is swimming in tea-coloured pond water. For a better video visit: http://www.youtube.com/watch?v=Ia3UeNzfQog