Popsugar Beauty Beauty Trends Flannel Hair Colour Trend "Flannel Hair" Is the Coziest Fall Colour Trend You Didn't See Coming 15 August 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 TrendsHair ColourRed Hair