Winter Wonderland wedding doesn't have to be a winter wedding. It's kinda fun to have it during summer, just to cool us down during the summer heat.
We can have the ceremony and reception indoor. 'Friends' had it with snow setting and Christina Aquilera had hers in front of the fire place.
The color theme for the ceremony and reception could be different. You can pick a vibrant color, such as yellow, orange and red for the ceremony an d bluish lighting with white flowers for the reception. I would add crystals and use lots of branches for the decor.
I would start the theme on the invitation card by adding branches, or have a branch design on it.