A Wall of Many Pastel Shades in Yambol

Simple to the extreme, unique one might say, but certainly different considering all the other wall that are mainly whitewashed in Yambol. Why this design is the question that begs to be answered. I can only surmise that some form of practicality prevails. Namely that the owner didn't have enough paint in one colour to complete, so used what was in stock in this case various pastel shades. Could well be a number of tester paints for free and decided not to follow up with a purchase - yes that might be it.