This option covers the first phase of the project:
 
Seal Coat – Application of 2-3 coats of seal coating over the new and existing asphalt as the last step. This would help seal up smaller micro cracks, protect the asphalt, and provide a bit more consistent dark color between the new and existing asphalt (not perfect, but less contrast). Sealing would be done after some power washing and cleaning of the asphalt surface by the contractor.