This is last years pots - the colours were lemon, lavender and lime with a sprinkling of white - very fresh and light in all weathers and at all times of day, luminous in the evenings: petunias, verbena and bacopa with some lime helichrysum weaving through.
Not simple in that they require planting up anew each summer, with about 12 plants per pot, and frequent watering and deadheading - but for sheer exuberance and abundant flowers all summer long bedding plants are hard to beat.