If it's a "delicate" kind of slingback; something with a thinner heel, I'd probably say no.
However, if it's a chunkier kind of shoe, I think it's fine. Not all trends should be followed, but it's sort of been a trend for the last couple of years to even wear tights with chunky sandals.
The first lesson of economics is scarcity: There is never enough of anything to satisfy all those who want it. The first lesson of politics is to disregard the first lesson of economics - Thomas Sowell