You did a beautiful job!!!
I wouldn't cut all that off either. If you can get the same of the lightest color, it will "float." Or if you want to add a grey, it will give it a border. I think either way would be beautiful!
Here's a link to a couple setting triangle charts:
https://www.pinterest.com/pin/55802482860920358/
https://ar.pinterest.com/pin/AeJkJZ8...qQxnfJFwxzWDU/