CMS | Forms | Javascript

I want to create a function where a customer, through a Webflow form, specifies a colour code and I search through my Webflow CMS to find the codes that are closest. I have API keys and a Collection ID, and I am new to both Webflow and Javascript. I manage parts of it but cannot access my CMS through Javascript in Webflow. How do you do it?

Here is my public share link: LINK
(how to access public share link)

Accessing the API requires an external server or service. This type of app or feature really would not be viable with the API due to limitations.

Okay, that makes sense. Would you continue with an external server or use another method to reach the same goal?

Usually I start with a set of functional requirements and then investigate which tools would be able to meet them. That takes work. I would start there.