Brown can be tricky colour to match with vibrant colours as Brown is not a fun colour. Brown and its shade are for timeless classic designs. It only goes well with conservative colours like white, black,grey and glass. Couple of options below

hi for internals you can use marine ply or water proof ply branded or non branded. In terms of finishing materials we suggest not to use ply etc since its kitchen. you can go for glass which looks elegant and easily maintained. Thanks Bhakti Bhojwani Team Ornate

Sree, There are so many products that can be used for finishing a TV unit. Laminates, Veneers, Glass, Charcoal, WallPaper, MDF, Duco, PU, Wooden & Stone Claddings .. just the few that come to top of mind. But what is that you wanted to understand about these. Thanks, Nitin Cornerstone Designs, Bangalore.

There is nothing special about Kerala climatic conditions that require anything special (yes, I have several years experience with kitchen cabinets there). You can use BS 710 or 303 plywood with laminate on them with excellent results. Several interior firms also use HDF/MDF with laminate without much complaints from their clients.