What would be the factors which one would need to bear in mind while choosing granite colour for a kitchen worktop?
The first factor would be to walk in to a granite supplier near-by which stocks, imports and deals with a large selection of granite slabs. Ideally you would like the granite colour to match up with your kitchen's cabinets; hence it would be advisable to carry a cabinet sample along.
Keep in mind that dark colour granite worktops for light coloured cabinets and light colour worktops for dark colour cabinets is an accepted standard and liking of most individuals as it aesthetically look more attractive. Also keep in mind that the same would apply in case of your granite colour having to match with your existing flooring.
Once you are done with your colour selection you could request the granite supplier to draw out a couple of similar slabs to check for variation in colour tones. Ideally run through the slabs which are a near match or a perfect combination before you intend to freeze on the granite colour, as it is a one time investment and you need to make the most perfect selection which won't make you repent later.