How can I make a textbox GUI have its text displayed on a value in a tool?

I am making a building game and I want to make a tool in where a GUI shows up and there's an option for a text box. You write the brickcolor there and the text (brickcolor) that you wrote is stored in a value inside of a painting tool. Then when you start painting the blocks, the color is the same as what you wrote in the text box. I know you gotta use remote events but I simply don't know how to use them properly. I watched videos, tutorials but I can't get this to work. There is nothing out there to tell me this answer. If anyone could tell me how could I archieve this and provide a small script detailing how it should work would be appreciated. Thank you!