Sealing a tile

I bought patterned tiles online for my kitchen, which looked grey.
In fact, if you take a pic with the flash, they still look grey.. however in natural light, they have a beige tint, which I do not like.
I was wondering about using an enhancer sealant.. however, I fear that if I use the product as it is, it will enhance the beige even more.
Therefore I was thinking if it will be at all possible to add a grey something to the clear sealant , such as a little bit of grey tile paint, so that they will take a grey tint, without completely covering the pattern, which would happen if I used the tile paint on its own.
Its just an idea.. I don't even know if it's chemically possible to mix paint with a sealant.
Perhaps you would know if my idea is at all feasible...or better yet, you may know an existing product that will help me achieve the tint change, without all the mixing experiment.
Thanks

Advice from 4 local tradespeople

Colourseal silicone would do the job , and try coloured grout , as light grey will enhance the darker colour

without seing what tiles you bought its hard to tell. but the tile sealants are for stone tiles the ones that if you spill red wine on it will suck it in. the only way to change a tile colour is to paint them or change them sorry.

No you must paint the right solvent on which there will be normally a choice of 3 to choose from, clear,light,dark to that's the normal procedure for stone pattern kitchen tiles.

I think we should use the tile grey paint combined with an base coat of acrylic based waterproof latex, it should be more effective against humidity

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