According to my weird calendar, one of today's holidays is Two Different Coloured Shoes Day. I happen to have the same pair of heels in two different colours, so although I must admit that I've never mixed and matched them with an outfit, it seemed good for a photo op!
These shoes were purchased/originally worn for two events in the same very busy summer when I got married-- our niece's baptism (the cream) and another wedding in which I was the matron-of-honour (the blue), but I've worn both pairs for many other things in the time since.