The best attribute of a lot of the plants for winter hanging baskets is that they are perennial evergreens. In late spring, they can be planted into the garden, then lifted in autumn to serve another winter season. This way, you can build up a great palette of plants for flamboyant displays, mainly relying on foliage.
I like to place a good-sized plant of variegated Euonymus fortunei ‘Emerald ‘n’ Gold’ or ‘Silver Queen’ in the center. Use ivies or Vinca minor for their trailing habit. Carex oshimensis ‘Evergold’ is a useful variegated grass-like plant with a tufted shape. Then there’s Ophiopogon planiscapus ‘Nigrescens’, which resembles a black spider plant. If you like silver, use cotton lavender as a center-piece. There are several good bugles you can use such as dark-leaved Ajuga reptans ‘Braunherz’ which will then provide groundcover when planted out in the garden in summer.
When planting up your winter basket, bear in mind that plants don’t grow much in winter, so put in big specimens, close together.