Kate Middleton's Trooping the Colour outfit had a deeper meaning. All about why the Princess of Wales wore aqua to King ...

The only daughter of Prince William and Princess Kate coordinated with her mom in an aqua color for King Charles' birthday ...

But do onlookers need to adhere to a dress code? And what do those inside the Horse Guards Palace need to wear? Here's everything you need to know... Trooping the Colour is the annual celebration ...

At Trooping the Colour today, Kate looked lovely in an aquamarine Catherine Walker dress coat that feature ivory contrast lapels and cuffs. She also wore a matching wide-brimmed hat by Juliette ...