Sending value from app to esp32

Hello everyone,

Using Esp32 as an access point (I will connect with a password just like a wifi network), I want to read the RGB values determined by the slider in a mobile application and output with these values.

I tried to do it with SoftAP, but the user needs to check the values directly from the application, not to be sent to a web page, and I am having problems in this regard.
As a note, the application will be developed by someone else.

Please read, consider and use this link: How to get the best out of this forum - Using Arduino / Project Guidance - Arduino Forum

what is the distance between the app and ESP32?
if you run a softAP access point on the ESP32 you can run any TCP/UDP client/server application to communicate (it does not have to be a webpage)
what is the app running ON? a smartphone?
will you implement the app? any idea what programming language?

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