Can I exchange some shelving for a different color if I don't have the receipt?

Im sure they do

I think they do .

Only in the box.

Is it still in the box?

Has to be in box

So long as you have the receipt, the policy said any item bought within the 365 days from the time of purchase, you can return or exchange.

If the product is still wrapped and in good condition they might accept

I'd call or check the website before lugging your shelving to the store!

Make sure you call

I'm pretty sure you can