Yes, you can set it to a static color. I can't remember if the remote comes with the color lighting, I think it does. But you will need to use the color remote to set the color. Search homedepot.com for (Model # HHRGB14 - there are two versions.
For a true yellow, keep your red and green levels both at a maximum of 255. If you set the blue level as 0, you obtain a bright banana color