Cherry Red Curl-Safe Hair Color Using a French Wash We used a gentle French wash (also known as a soap cap) to softly lift years of dark color without compromising her curls. This technique allows for a subtle lightening effect before layering a rich auburn cherry red over the top — adding brightness, depth, and dimension while keeping the curl pattern fully intact. A French wash is a great option for clients who want a change after long-term color buildup but don’t want harsh lightening or damage. Denver hair extensions