Me and Neil were chatting about paint colours for No. 42 the other day. I asked him which wall sample he preferred in each of the rooms and he replied: "I don't mind, as long as the whole house isn't grey. These samples all look grey" Oopsy!
I would've never thought to use river rock at the base of potted plants/at the edges of the patio, but maybe that could work. A larger, flat top rock could even act as a riser for a led candle lantern, etc.