4 ounces (1/2 cup) blood orange simple syrup (reserve a small amount for rimming the glasses)
Kosher salt for rimming the glasses
Blood orange slices or wedges of lime for garnish
For the blood orange simple syrup, combine the water, Blood Orange Marmalade and sugar in a small saucepan. Bring to a boil over medium heat, stirring until the sugar dissolves. Remove from heat and cool.
For the margaritas, combine the lime juice, orange juice, Tequila, Triple Sec and blood orange simple syrup in a pitcher. Refrigerate until ready to serve.
Moisten the rim of two glasses with remaining blood orange simple syrup. Pour salt onto a small plate. Dip the rim of the glasses into the salt. Place ice in each glass; fill with blood orange margarita and garnish with a slice of orange or wedge of lime.