The next Colours we will look at are the Colours of the "Kings Maiden Guard". Below we have the King's Colour (top), and the Regimental Colour, (bottom):
The "Bursting Grenade" indicates the Regiment belongs to either the "Royal Household Brigade" or it is an "Elite" formation / unit. The Maiden Guard is both.
The Regimental colour displays the Regiments Name on one side, and the Regimental motto, ("None Shall Pass"!) on the other.