What colours are in the adjoining rooms? What type of decor elements do you have in your kitchen? What colours make your heart sing? I see what you mean by little colourful online inspiration. Had a peek on Pinterest and all I saw was lots of white and grey. How about green, blue or yellow? It's always tricky to find "the" wall colour but the best trick is to choose wall colour last because paint comes in infinite colours and can be matched to anything whereas decor (accessories, window treatments, etc.) doesn't.

Until all the elements are installed it is difficult to choose paint colors