That line in my post title from Robert Frost's poem no doubt has deeper meaning than the flowers in my late-summer garden, but it works. For the most part, the color I see outside is gold: sunflowers and Black-Eyed Susans (rudbeckia). We've had more than 6 weeks of dry heat (temps between 90-100 F), so the flowers that thrive in those conditions are much appreciated.
I planted three varieties of sunflowers in the spring, and they haven't disappointed. The perennial "susans" pop up in various areas of my planting strips and I don't discourage them.