(BTW, these colors are not true to the full palettes).
This basically means that you can wear many of the colors from your group's sister palette. For example, if you're a Cool Summer you can wear some of the Cool Winter palette. Or if you're a Clear Spring you can pull off the colors from the Clear Winter palette as well. Also, if you have blonde ashy hair which is considered a cool characteristic along with a warm characteristic such as golden brown eyes it may be an indication that you're a neutral, a Soft-muted, which means that you flow between Soft Summer and Soft Autumn and can wear both palettes.