Hi. I am the original poster who asked this question last year! Thanks for posting, Lynnster52, as I am sure it will help others. I am sure that Avalanche looks white next to white tiles. However, I ended up trying a sample tile board with the Avalanche (sanded) grout and it looked pinkish (I mean a slight pink undertone) next to my yellow-undertoned ivory colored tiles. I think it might have been the pink undertones in the sand causing that effect next to my tiles. However, I did notice that if I held a sample of the avalanche grout up to something white it did look pure white! So I guess how we see color really does depend on what is next to it.
Part of the reason I was so careful about finding the right white is that I remember someone posting on this board (from 4 or 5 years back, I think) how the white grout looked purplish next to their yellow tiles!! They had photos of it, and I wanted to make sure I didn't end up with the same thing! I think there is a name for this phenomenon, something about seeing the color opposite on the color wheel on an adjacent white surface. (or something like that!)
I ended up trying out 13 different types and colors of grout (mostly whites, but I even started trying other light grout colors) on my sample boards. Nothing was looking right. (If my husband knew how much I was spending on grout he'd have a fit!) I came to the conclusion that there must not really be any such thing as a true white sanded cement-based grout! (After all, cement is grayish and sand is pinkish, right?)
I finally tried a brand-new type of grout that had just come out by Mapei called Flexcolor CQ. It is not cement-based (it is a ready-mixed silicone acrylic or something like that). Lo and behold, their standard white grout looked like a beautiful, clean white next to my yellowish undertoned tiles!!! I was so ecstatic to finally find the right grout. I never thought I'd get that excited about grout, ha, ha! (To tell the truth , though, if I hold a piece of very white paper next to the grout, I can tell that it is a "warm" white, rather than a cool white. So if anyone else out there needs a warm white grout, I would highly recommend the Flexcolor CQ standard white grout.
It is an expensive grout, but it never needs sealing and it is very stain resisitant . It has held up really well on our kitchen backsplash. I really love the way it looks and has held up (Being ready-mixed it was easy to use, too.)
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