If theres limited natural light a white kitchen will help but it'll still be dark. Look at adding natural light such as a skylight, a bigger window, etc.. The layout of the windows, rooms, orientation, etc. for example needs fixing first rather than the fit out compensating for it, if you intend staying for quite a while.

Hi Marie, in this instance we always love to compliment the scheme with a contrasting colour. Ultimately the glass splash back colour should depend on the bench top colour. For instance, if you have selected a lighter bench top we would recommend a charcoal splash back, however if you have chosen a darker top we would recommend something to match the cream cabinets. Don't second guess your selection of a glass splash back - these can look fantastic applied to a kitchen, very contemporary!

Are vinyl planks expensive ?

Go to one of the kitchen stores or even the big box stores and pick up a bunch of samples. Try them out in your kitchen in real light, and if you have already painted, against the real paint colour. Also, try them against the cabinets. We found that, in a kitchen with not a lot of natural light, and with kind of greyish cabinets and off white walls, we wanted a much lighter benchtop than either cabinetry or walls. The very light white benchtops now stand out as a feature of an otherwise bland kitchen, but it was only trying a number of different samples "in situ" that told us that.