My colors on the rocket are a little different than yours; my launch pad was reasonably close. But now, when I was working on the top ground layer color, switched to render mode (Z ==> render) and I got this, with the main issue being that everything is too dark and the rocket fuselage fades into the background ...
This is because rendered view doesn't have any lighting set up in it. We'll cover more of this in the Preparing for Rendering and Loose Ends lesson. Until then, I advise that you use Look Dev mode.
