yes bro u r right Sheikh looks
very dark from a distance, but its an
illusion , because of the shade of his beard and what he wears on head (lol i forgot cant remeber plz tell me ill edit my post ),
i mostly pray on first floor exactly above Bab e Aziz , when i used to see him from first floor he always looked really dark from there,
and after prayers when i use to go down and see him from 5 to 10 feets distance he always looked fair and slim
i must say he looks totally diffrent from Teleivsion.
and one more thing when he comes to lead pray , he looks very serious but after prayers he is like smileing ,talking to gaurds and other people of staff shaking hands 
last time i saw him on july 7th 2006 i was almost in front of him during khutbah , he was looking very good mashaAllah , i think bro webcoran has the video of 7th july. i want to see that video maybe they have shown me also
. bro webcoran plz give me the link if u have the video .