How can we change icon colors in Red_Green HTML5 template?
I believe you need to edit the images in the skin folder. Or browse for new images you want to use instead.
There is no skin folder. There are templates.
Right-click on the skin and select Show In Explorer.
Templates is a new name for the skins in 2022 but it's the same thing.
In the editor I think this is where you need to be. If you are not aware, frameless templates offer much more customisation but it will change context sensitive calls if you use URLs.
My site www.grainge.org includes many free Authoring and RoboHelp resources that may be of help.