Hi @fayelouise
If you mask of the bench top and other areas, you want clean. Any craft spray paint will do to colour the glass as an opaque colour not translucent.
This will give you a nice even sprayed finish like the original glass.
Or
Why not consider installing a new Polymer coloured splash back over the top of the glass one as all you need is a few dots of silicon to hold it on the wall.
eg Coloured splash backs
