In a large bowl, combine crushed pretzels, sugar and butter. Mix well and press onto the bottom and sides of a 9 inch pie pan.
In a large bowl, combine sweetened condensed milk, lime juice, tequila and orange liqueur. Pour half of the mixture into another bowl. Add strawberries and a few drops of red food coloring to one half. To other half, add only a drop or two of yellow food coloring. Fold one cup of whipped cream into each half.
Spoon into crust, alternating colors. Freeze for 4 hours or overnight.