"Autumnal colors" refers to the various shades and tones of colors seen during the fall season, such as shades of red, orange, yellow, and brown. Full definition
The ladies even had the same undone chignon, though Julianne gave her look a pop of autumnal color with dark berry lips and smoky eyes. (brides.com)
Designer Nina Farmer layered shades of gray with autumnal colors in a New England home's master bedroom. (housebeautiful.com)
Best of all, Lee Krasner from the 1950s brings back the days when Robert Miller displayed her bursts of autumnal color in the Fuller Building, and I can still smell the hair salon down the hall. (haberarts.com)