- This shade works on dark blonde to dark brown hair. Say goodbye to boring colors with unique metallic radiance with got2be Metallics Dark Ruby! However, rubies come in a variety of colors from bright red to dark pink. The most valuable ruby gemstones are a dark red known as blood red or pigeon blood. The following are common named colors inspired by rubies… - Permanent- 1 application - With Metallic-shine booster for cool, shimmering tones. Ruby is a dark red or reddish pink that is inspired by the color of ruby gemstones. The first recorded use of ruby as a color name in English was in 1572. https://www.gemnation.com/base?processor=getPage&pageName=ruby_color