Lobelia cardinalis 'Victoria' with scarlet flowers on tall dark chocolate stems is the most striking, and draws a lot of visits from hummingbirds.
Right beside it is Helenium 'Rubinswerg', which has clumped up nicely in only a year. It has more orange in it, and I haven't quite decided whether it complements or clashes with the lobelia.
Off in a shady corner, Hydrangea serrata 'Beni' is still putting on a show. As the season progresses, more red and purple tones will seep into its leaves.
In a back corner, Rodgersia aesculifolia 'Maurice Mason' has a single frond of a more dusky red. This is a plant that has been reluctant to bloom. I'll give it a good top-dressing this fall, but if it doesn't reward me with more flowers next year, it's on borrowed time.
Out in front of the house, my recent acquisition of Disanthus cercidifolius has a few crimson leaves etched with gold, anticipating its eventual autumn blaze. Since this is its first year here, I'm looking forward to the coming show.
I now have an urge to put more reds into the mix at this time of year and would welcome any suggestions.