Can't seem to find a picture of it, but I liked my 'Sweet Tea' paired with Corydalis 'Chocolate Stars'. The orange-y color of the X Heucherella brought out the bronzy tones in the foliage of the Corydalis.
CMK

It looks good with Purple too. I like mine with Woodland Phlox.

Yep, mine's in with the purples and blues - campanula,phlox paniculata, clematis Rooiguchi, rose Eyes for You, polemonium Lambrooke Mauve. I also have it with geums, libertia and it flirts with glaucous poppies with terracotta flowers (P.rupifragum) and a couple of the smaller tulips - the little lady tulip, T.chrysantha and the late flowering T.sprengeri (this is not a combo for the fainthearted)

It's really lovely with Dryopteris 'Brilliance' and Heuchera 'Obsidian'. Brings out the orange in the fern.
It's also very pretty with blue hosta.

Thanks, everyone. If you happen to have pictures that would be helpful as well.
Your ideas for blues reminded me I have three colbalt blue pots of different sizes. I fell asleep thinking about them filled with "Sweet Tea" . Maybe edged with black Mondo Grass.
What could I use for height?
One reason for my failure of imagination is that it is still "mid-early" spring here in E. MA and there really isn't anything flowering but bulbs.and emerging foliage. Placed on the still mostly bare ground the foliage is blinding.
I have about 8 h."Caramel" which also came through the winter beautifully. But there's enough browns and softer tints that they are easier on the eye.
Idabean.