Everett is a generalized shade of purple. Since many people like the color purple it is upon them to determine what their 'Everett' is. Everett is usually your favorite shade of purple but can be used as a synonym for purple.
Jessie: Wow! What color is your sweater!! It's beautiful on you!
Bean: It's Everett !
Jessie: Everett ?
Bean: Its only the BEST shade of purple! How don't you know that!?