Neopixel RGB controlled by bluetooth

I have some doubts, even though I have searched the internet I have not found a way to do this. I have just started a project in which I want to control an 8 x 8 rgb neopixel board via bluetooth with the HC-05, right now I can change the color and change the mode. My problem is that to change the color I have to use buttons in an application that I create and I would like to be able to control the change of color with a Color Picker, I just don't know how to do this, I don't know what the code for that is and I can't find no information. I'm not looking for the code, I'm looking for someone to explain to me and can give me an example of how to do it. I hope and someone can support me, thanks.

Perhaps we can help, but not with the information you have given so far. We would need to know much more about the components and software you are using. You are building a control app on your phone? How are you doing that?

You are going to have to learn Java and write an app for Android devices or learn how to program using MIT App Inventor.

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