One of the things I lionize about classic men's style how timeless it is. Even though men's style evolves there is, however, a standard to which all gentlemen subscribe to and uphold; dress code if you will. After my initial forays into men's style I held onto this remote premise that horse racing events preclude the wearing of a suit. This is not entirely true because a suit can be worn as long as it's not a business suit (thank you Winston). So dark, solid colours are not appropriate. Looking at the Durban July, South Africa's biggest horse racing event, the men's dress code should be elegant, classic, but fun. Don't take it too seriously.
The follwing ensembles are taken from a lookbook that was released in 2010 as part of a autumn/ winter collection. I think they are sensible and appropriate for wear at a horse racing event because they are a mix and match of trousers and jackets, and the suits are colourful enough and toned down by the double breasted design. Nothing outlandish or garish, neither boring nor bland.
Most of these combinations are constructed from flannel, wool and some cashmere. As warm as our winter is, including the first Saturday of July, the fabrics and materials used are light weight. Which means you'll be stylish and well prepared for the weather.