Even evergreens undergo seasonal colour change. This is normally secondary as a result of new spring growth.
Below is an example of this for a Yew tree
What you see is that the new growth is a much lighter colour than the old leaves further down the branch. This leads to the tree appearing a much lighter colour in the spring and darker through the rest of the year.
You can also have brighter coloured trees as a result of variegated foliage.
What this normally means is that rather than being a single colour, the leaves have a range of shades, normally across each leaf rather than regional on the tree.
There aren't all that many trees that display this particular feature, it's more common in smaller species, bright colours are less common than a couple of different shades of green. For some reason it appears particularly common in ivy (at least to me).