Well, the blue color may be copper sulfate crystallization occuring in the copper pipes, the accumulation of which could possibly be blocking the pipes.
Or, in the words of famous man... I could be completely hatstand.
edit: i just re-read your post and now realize you were talking about the tile color... just ignore me please. I'm off to find some coffee....
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Perversion is the true spice of life: Variety is just part of a healthy diet.
[This message has been edited by Absynthe (edited 10-11-2001).]