As an avid gardener, not only do you love your outdoor landscape, but you likely also enjoy some foliage inside your home. While indoor plants will not have the fall color to bring them scarlet foliage, several species have beautiful red flowers. Also, as gray is still a hard color to come by in plants, many species offer variegated foliage which would work well as a substitute. Besides, you'll have all your Buckeye posters and your flags already on the walls, you'll just want the plants there to provide a nice contrast in colors.
An indoor plants web site, such as Zone 10, can help you browse for houseplants with red blooms. Here are a few examples:
With the exception of 'Bob White', these are a few examples of variegated foliage: