Garden Party Formal Attire. The queen’s garden party is one of the few places for which morning wear is the standard attire for men sartorial travel: Women should wear dresses or a nice shirt/skirt combo but pay.
The colors can be light tan, khaki, light navy or shades of grey and the fit can be more relaxed than that of a full suit. Flip flops or open sandals. These would be considered more formal garden wedding attire since the flowers are on very dark backgrounds.