Those who have mentioned plants of similar parentage are correct: as long as their bloom times overlap, they can/will cross-pollinate. Judd Viburnum, Burkwood Viburnum, and most Koreanspice Viburnum will overlap and cross-pollinate.
As for answering a question about what a plant looks like and its relative foliage coloration...post some images! There are more than a couple Viburnum species that have snowball style flowers - V. plicatum f. plicatum, V. opulus, V. macrocephalum 'Sterile' - so comparing foliage darkness or lightness is not sufficient to answer a question about what species it might be.
Show the whole plant, and then progressively more detail of leaves, stems, branches, trunk, buds, flowers, etc. to fully present what an unknown plant is. Digital images are essentially free, the full record is beneficial to you if you save any of this kind of information, and you can post images here interminably for all observers to learn from and benefit perpetually.
Why do less? Ever?
