Advice Re: Unresponsive Customers

I’d love to hear how you handle the orders of unresponsive customers if you make a personalized occasion specific gift.

For the item I sell the customer picks a primary and a secondary color. The other night a potential buyer messaged me saying they wanted a specific color that was not listed in my options.

This is great because I put a note on my color chart telling them to message me if they don’t see the color they are looking for.

What was not great was that she went ahead and placed her order immediately after messaging m and before I even had a chance to reply back. Thankfully I had a color I think will work for her and I sent a pic of it for her approval within 30 minutes of her message/order but it has been two days since then and no reply.

I will message her again today but if I still don’t hear from her do I just go ahead and make the order with the color I think will work and ship it out?

How do you all handle this type of situation? Should I think about writing a shop policy related to this?