Would it be weird if I bought one just cause I wanted a purple chainsaw?
Not at all! We incorporate these colors because we listened to our customers when they say they want a specific feature or color for our Sun Joe products 
Awwww, I was hoping it would be my new cordless assault weapon for close-quarters combat. Now that dirty uncle Joe wants my ARs and Glocks, I’ll need to figure out some other way to protect my unarmed family cowering in the root cellar.
@kbenavides ok, you sold me - I ordered a purple one
Can this be used with a dewalt trimmer?
I don’t see anything in the description saying that this is run on a battery and it says that it has a 1.5 ft. cord so I would say no, you cannot use this with a Dewalt trimmer. Does your trimmer run on a battery? If so, I think you are out of luck.
Definitely not cordless. I have a green one, and it works well. Convenient not to have to start up the finicky Takata chainsaw I own just to trim a few branches.