There's a good post by a GI on Mayo Clinic's site... I tried to find it, but I couldn't - too late, must get some sleep! BUT - once I was worried and this dr's post helped my anxiety by defining different colored stools. However, yes, mine have been yellow sometimes - usually during a severe flare up and it can be due to the bile content in your stool. I was checked for gallstones, but not the problem. This dr. explains every color from dark brown to green!
-------------------- "I Will Survive! :-)... I shall live and not die and declare the works of The Lord..."
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Re: Question about light colored stools
BUT - once I was worried and this dr's post helped my anxiety by defining different colored stools. 
