Purple and Yellow Houseleeks
Sempervivums are one of my most favourite plants. Easy to grow, not much care required and they come in all sorts of colours, shapes and sizes. The ones in this picture are quite small but if you look closely you can make out the needles on the edges of the leaves.
This edit adds a purple and yellow hue to really show the flow of the leaves of the plant, leaving a stark contrast against the white background.