The secret ingredient is... turmeric!
On a small plate, mix 2 tsp. turmeric, the sugar, chili powder and salt. Run the lime wedge around the rims of 4 glasses. Dip the rims in the turmeric mixture.
Add half each of the pineapple juice, tequila, lime juice and agave nectar and 3/4 tsp. turmeric to a cocktail shaker. Fill with ice and shake until the outside of the shaker becomes frosty, 10 to 15 times. Fill 2 glasses with ice and strain the margarita into the glasses, dividing equally. Repeat with the remaining pineapple juice, tequila, lime juice, agave and turmeric and more ice. Garnish the drinks with the pineapple wedges.
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