Whilst foliage and flowers can be a strong source of colour, the vibrance of bark/stems can often be overlooked. Bark/stems can be seen all year round with the effect often exaggerated in winter when the stems are exposed and the surrounding landscape is diminished and devoid of colour.
Tree species with visually warm bark/stems include Prunus serrula, Tilia cordata ‘Winter Orange’ and Salix alba ‘Britzensis’, and can be particularly stunning when used in conjunction with the colourful dogwoods.
Image © Prunus serrula; Esther Westerveld
Birch species are often used within landscape schemes to provide interest through bark and if used in contrast with species such as Cornus alba ‘Kesselringii’ which have black stems, or Pittosporum tenuifolium ‘Tom Thumb’ with its dark foliage, the contrast can create eye-catching landscape features.
Image © Pittosporum tenuifolium ‘Tom Thumb’ Acabashi; Creative Commons CC-BY-SA 4.0; Source: Wikimedia Commons
For further information on trees/shrub species with vibrant bark see the link below to the RHS website.