Add colour to your room with accessories, then You can change the look whenever you feel like it, without having to paint the walls.

Really hard to tell. I like the lightest one but I'm not very adventurous. You may need to choose one and paint a larger area and see what you think.

Hi MaxCC, Your 'artwork' is called a wall niche. As far as I know, they were originally used to display religious icons, such as The Virgin Mary. I'm not religious but I do admit that I have a special love for wall niches. I have used them twice in homes that I've built as a place to display my 'Lamplighter' Lladro, so that he is on display to guest. The niches were always placed just inside the front entrance as yours is. Sadly I don't have any photos to show you, as we have just moved house and everything is still in storage. My suggestion, to help you with how to display the object that you will put into your niche, would be to keep the wall itself neutral but paint the niche in a metallic paint. Your want the object on display to be the item of greatest interest and the metallic paint [Resene have some wonderful colours to chose from] will help to draw your eye to that space.

Given your cupboards are Lexicon I’d stick with that either in half or full strength.