People always want to know what the difference is between different types of sipping tequilas. Here is a quick summary of what you can expect based on the age of the tequila and time spent in barrels; the color isn't your only :

Silver/Blanco/Joven: generally unaged (or very briefly aged, for smoothness, e.g. “Suave” styles); full of agave flavor, but also heat, and an impression—but not taste—of vegetal sweetness

Gold: Basically a hybrid type, usually a mixto with coloring added to make it seem aged when it’s not; best bet is buying a brand that actually states “100% agave” on the label

Reposado: Meaning “rested,” aged in wood barrels for 2 months to under a year; great for cocktails and a step up into the lightest of brown sippers

Anejo: Aged between 1 and 3 years, the widest available complexly aged tequila, with softened heat and good wood character; too much aging isn’t recommended, as tequila is about expression of vegetal agave

Extra Añejo: A newer category, aged over 3 years, greater wood notes from time in barrel, deeper color, complex layers of sweet and spice

Cristalino: An Extra Añejo that goes through an additional filtration to remove the amber color, resulting in a clear tequila that has been aged (not to be confused with a blanco)