Do they have to match?
Last year I purchased an approximately 1500 sq ft zero lot line home with 2 bedroom and 2 baths. Before moving in I redid the master bath (picture 1980's with lots of fake marble). I replaced the original vanity with wall mounted modern cabinets from Ikea. Surprisingly, I actually like them. Since it is only me and I very seldom use the drawers I am not that concerned about how they will hold up long term.
I got the same dark brown vanity and top in the guest bath.
I am trying to get a feeling of cohesiveness throughout the house like you feel when you walk through a model home.
Now I am ready to do the kitchen. Do the kitchen cabinets need to be dark brown? Does your cabinetry match throughout your house?