Adding a response slide in Presenter

I want to add a "slide" to a service that consists of two lines of text in different colours, the first being what the leader says and the second being the congregation's response. My particular requirement is for a response during prayers of intercession, but it could be needed anywhere in a service. The "slide" will never be used again in any other service.

Firstly, what is the correct sequence to do all this, please? I can create a new slide and type text into it, but I got in a complete mess trying to change the colours of the two lines, and adding a background image. What's the correct order, please?

I find changing the colours particularly difficult: when I select Color I appear to see a box in which I can type the Hex value for the colour I want, such as #DAF036 for a pale yellow. However, after each of the characters (Hex digits) that I type, input focus returns to the text itself, and I have to click in the color box again to type the next character. Am I doing something wrong, or is this a bug? Is there really no way to have a set list of standard colours as part of a service template to ensure consistency throughout services? (I previously worked with EasyWorship and that had that concept ...)

In case it makes a difference, I am running Presenter on Windows 11 and it is version 2025.1.1