All garden gnomes must have blue pants and red hats.
In addition, they CANNOT under any circumstances be pushing yellow wheelbarrows! Only brown, simulated-wood wheelbarrows, please.
You have now violated the purple only rule!!!
The purple only rule is for flowers and the clothing of the people standing in the yard. Nobody has restricted the clothing of garden ornaments to purple (yet).
However, in the spirit of co-ordination, I'll go for purple pants and hats. We can't have anyone clashing with their neighbours, now can we?
In addition, any cars parked in the driveway must be a co-ordinating colour - blue, purple, silver, or black, please. Those of you who want an unapproved car colour must park your car inside your garage at all times.
And you cannot keep your garage door open for more than thirty seconds, nor can you idle your car outside your house for more than that. Visitors with unapproved car colours must park elsewhere as well.