Here are some really good examples of combination planting with clever use of colours and textures.
These two tulips look fabulous together; as well as the different colours the two varieties grow at different heights adding more drama to the scene.
This is a different garden but again in the cottage style.
See how the dark Heuchera colour is balanced with the orange of the Euphorbia Fireglow, leading the eye down the garden.
Four years ago this was a long herbaceous border with a small bog garden in it. It was a massive area on heavy clay soil, which took forever to weed. So we decided to make it into a woodland walk. We put bark on the floor to help keep the weeds at bay, and look at it now.