As of November 2015, websites for Global Art Supply, DecoArt and Hiller Productions offer acrylic paint conversion charts. Global has a PDF that compares Americana and Heritage brands of acrylics. For each color swatch, the chart displays the Americana name and the combination of Heritage paints needed to match it.
DecoArt's site offers several charts. Most compare DecoArt's Americana acrylics to different brands, such as Derivan Matisse Flow, Plaid FolkArt and Jo Sonja Artist's Colors. Americana color combinations correlate to other company's color names.
Hiller Productions' chart is different. Instead of showing the full color conversion, it pairs similar colors of Delta Ceramcoat and DecoArt Americana. The purpose is to find appropriate color substitutes.