Popsugar Beauty Beauty Trends Flannel Hair Color Trend "Flannel Hair" Is the Coziest Fall Color Trend You Didn't See Coming August 18, 2018 by Alaina Demopoulos View On One Page Photo 3 of 5 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 3 KJ Alpa What is in the water at Riverdale? Apa matched his hair to flannel — and his co-star. Previous Next Start Slideshow Beauty TrendsRed HairHair Color