You are going to have to leave your comfort zone on this one. Walnut is "brown", you have "pink" as a counter top. I would suggest going with another version of the colours already in the room. you have gray/beige and white. I would hesitate going white...but it can be done. You can move into the grays and be very happy (it would look very modern) or you can move into a beige that holds a hint of pink in it (not pink...but a blush of warmth). Or you could go really wonky and add in something like a brushed stainless steel look to the cabinets and have it go "space age". There are specs of blue/gray in this counter top. The next think to look at is an "ashwood" or dark gray wood presentation that has some blue in it. It would lighten the space yet still add drama that dark cabinetry offers.

The color of walls of your kitchen completely depends on the color of your cabinet, but you can opt for white color as that color is plain simple and goes with any color cabinet. But in kitchen while making food there are many things like smoke, grease or staging of oil or masala can make the color of wall look dull and bad and it gets more dull after every cleaning, whereas by applying wallpapers, your kitchen will look much more younger than paint and wallpapers can also survive almost 10 years if maintained properly. A few wallpaper Ideas that i can suggest for your kitchen are:- Modern wallpaper - Modern wallpaper designs are not constrained by any particular patterns or fashions. A wallpaper pattern featuring exotic fruit or animals is just as likely to have a quirky lobster theme as it is. Other possibilities include 3D geometry, abstract florals, and odd ornamentation. The wallpaper will have more effect with modern furniture. Retro and vintage- When the kitchen walls are decorated with antique and retro patterns, a certain whimsy and nostalgia are added to the space, creating a really particular feeling. Flower Power themes, arty or modern designs from the 1950s, 1960s, and 1970s, and large geometric patterns are characteristic for this. Brick and stone patterns- Materials used in country/historical kitchens over the years that are indestructible but also incredibly cosy haven't lost any of their attractiveness and function flawlessly in 21st-century kitchens. Stone appearance wallpaper styles, such as brick, sandstone, clinker, or even concrete, emanate a feeling of solidity and sturdiness while yet having the potential to seem completely modern when paired with the appropriate furnishings. Marble- Superior marble is the epitome of subtle elegance. The best option to realise gorgeous and glitzy kitchen decor ideas is with deceptively genuine, costly imitation marble wallpaper models. Marvelous effects are produced for walls by contemporary, inventive marble forms and colours. Tile Design- Numerous kitchen design ideas are derived from instances in nearby and distant other nations. These are only a few instances of the vast possibility offered by tile imitation wallpaper. Other possibilities include artistic Spanish Majolica-style tiles, oriental decoration tiles, Delft tiles from Holland, and Roman frescoes.

There are probably 5 million kitchen photos here on the Houzz website. What I would suggest is looking through some of them to get an idea of what you like. Also posting photos of your space (jpeg format) helps visualize your options. We could just randomly throw out suggestions but it may or may not be what you want. Good luck! [houzz=https://www.houzz.com/photos/083-contemporary-kitchen-phvw-vp~439007]

add some pictures of your space for better suggestions