I am here to complain about how uninspired and unoriginal "Hillgrove Campus" is as a school

The second note is that red and blue are the most popular and are both taken by nearby schools.

To solve this problem I recommend
"Garden Gnomes" as the mascot. They Go with the name 
"green and purple" as the colours. Green represents the nearby nature and purple represents royalty 

I hope you realize your mistakes 

Let's go Garden Gnomes!