Instead of keeping the one large grass- I would replace with 3 of these blue stem. Stays smaller and better color with your other plants. Little Bluestem Prairie hybrid perennial grass. Foliage is intense blue turning purple in the fall.
Festuca Boulder Blue - Discovered in Colorado, Boulder Blue has a much brighter steel-blue foliage color than the more commonly available Elijah Blue. This hardy, perennial grass forms tufts of metallic-blue fine foliage from early spring through late fal