vodka, curaçao, crushed ice.This cocktail actually exists. You can drink it at the Perl Café, in Lyon. (I haven't tried.)
When I was university in Southampton, there was a classy place called 'Clowns' where their happy hour on a friday was 2pm to 2am. For 5 UKP you could get a quadruple vodka, blue curaçao, and orange juice (in a pint glass).vodka, curaçao, crushed ice.
The main side effect was that your tongue turned green and you staggered home. That's my kind of Perl cocktail