The best way to learn proper English is to read news report, and watch news on TV. Watching TV shows is a great way to learn casual English, slang words, understand culture reference and humor. If you have already watched these shows then you may recall the words used in the following dialogs.

with a purple STRIPE,
when, in fact,
The Big Bang Theory Season 12, Episode 13

You're not wrong about Fruit Stripe.
I was always a Hubba Bubba man.
The Big Bang Theory Season 9, Episode 8

Oh, no, it's all right. I think of my time
with Amy as a stick of Fruit Stripe gum.
The Big Bang Theory Season 9, Episode 8

had a purple STRIPE on their
flag from 1721 to 1917.
The Big Bang Theory Season 12, Episode 13