I always prefer white or off-white for something big like closets (my bedroom closet is a built in Ikea in white)… that way you can always paint it or add fabric curtains or fun knobs in the future – like in this mood board, brass knobs on a white fixture would be really nice and blend in to the rest of the room without expressly drawing attention!
I love the design style you’re going for. I think white or off white would look great with your style. Here are some design styles I found that might work. I am a sucker for vertical wood paneling of some sort so I have a lot of examples of that. I also love a raw wood material. I also notice you have green in your color pallet. I dont how comfy you feel with color but making the wardrobes a deep green might be super fun!
I’d go with an off-white or soft ivory wardrobe. It will keep the room feeling bright, blend beautifully with the light walls and flooring, and complement your existing furniture. Black may feel too heavy, while grey could make the space feel overly muted.