Yup, flooring first, always.

A soft, warm grey shade would look lovely, and can be as dark or light as you want. A warmer shade will work with the brown stained wood floor, and the grey will complement the black granite. You could have an undertone of green, blue or tan if you didn't want a pure grey. And it would look nice with any silver metal hardware, either polished or satin/brushed, so you could choose pewter, chrome or nickel. It would still work with white trim too.

You have three different laminate floors. If you want unity, you need to decide what will give you unity faster. The floors are close enough to ignore there differences. Without seeing the wardrobe units I can only guess what will work best. Add photos of the units you are contemplating and you will get more responses.

Hi Chayya, For a contemporary style kitchen, you can go for a monochrome theme for the entire kitchen like a matt grey with brass seamless handles. It can be a good option with a white backsplash. You may also consider combining brown patterned finished shutters with lacquered white finish for a clean, contemporary look. Hope these suggestions help you