OK, so maybe blue-on-blue isn’t the most ingenious color combination you can think of. You’ve got to add something else – let’s call it the anti-blue – as a contrast between them, to give them definition. Some drama.
The remarkable sea holly (they’re all great; this one is Eryngium ‘Blue Star’) looks like a bouquet of tiny blue pineapples turned crumpets-over-teakettle rising about two feet high.
Since Elijah tops out at only 10 inches, there is room between the ankle-high, blue leaves of grass and the knee-high, architectural Eryngium flowers of the same hue to insert this transition.
One of the sparkling pink penstemons would be dandy, as would almost anything in yellow (say, the long-blooming daylily named Happy Returns).
But the blue fescue provides its own layer of contrast soon enough in the form of its golden wheat-colored seed heads.
Subtle? Yes. But kind of dreamy, too.