"a yellow one" is a correct and usable phrase in written English.
It is often used to refer to an item of a certain color that has been previously mentioned or implied in the context of a conversation or text. For example: "I don't like the red one, let's get a yellow one instead."
For instance, you can divide your assignments binder into 3 parts: a red folder for assignments you have to complete, a yellow one for the ones you're working on, and a green folder for any papers you've already delivered.
From January through March, many trees with many different colors of blossoms are in bloom, but, Gorinsky said, "The fish will take a pink flower over a yellow one, even if there's no pink ones on the river".
If you're dressing as him when he wears his yellow sweater just put on a yellow or orange sweater (If you don't have a yellow one) and a pair of black pants (Tights for girls if wanted).
"Although probably not a yellow one".
Cars make noise — look, there's a yellow one!
Witnesses had said the attacker was wearing a yellow one.
"I'm scared of getting hurt and I tend to protect myself," announces Lauren B, the stewardess from Marina Del Rey, before departing on a yellow one-prop plane for a date with Ben.
We got back into the car and drove past a frozen marsh and some acres of trailers to the guesthouse: a yellow one-story building with a flat tar roof.
After that, they gave me a vermilion one colored with radish, a bright yellow one (turmeric root), a deeper red one (beet), jelly beans tinted with purple carrots and spirulina-blue Skittles and Starbursts.
Pick up a giant yellow one or a slightly smaller version in tasteful bronze – or else just wait until you and your 1% friends meet later this spring in Hong Kong or Basel, where you can try again.
