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Colors and aspects
Color on an altar is a way of naming the work. It is not a menu of spells.
White
Cleansing, peace, protection of the home, healing, blessing a new table. This is the robe of Niña Blanca.
Other colors, named without selling them
Red is often love and blood-heat. Gold is often livelihood. Black is often shielding and the grave itself. We mention them so you are not lost in a shop. We do not run those workings on this site.
Mixing
Many devotees keep more than one robe. If you do, keep the jobs distinct. Do not dump every fear onto one candle and call it tradition.