The reversible blade feature is one wherein the blades have one finish / colour on one side and a different finish / colour on the other. So you may have a different looking fan when blades are reversed.
Our wooden fans for example: have a Walnut finish on one side and a Burgundy finish on the other. These are Classic, Diana, Victoria, Elegance.
We also have a fan like Pluto – that has Matte Red colour on one side of the blades and Matte Black on the other. Reversing these blades changes the look of the fan completely.