The first layer of paint goes in for the background; “Mars Yellow” which is something like an orange toned iron oxide red. Good for a first layer. With these, I’m likely going to put the second layer down as a titanium buff / naples yellow for a more cream coloured base with hints of earthy … well, marsy… yello peaking around the edges.
Inner spaces will likely pull underpainting colours from a pool of cadmium orange, a bright yellow of one shade or another, turquoise, a light green… and then final colours of alizarin crimson, burnt umber, burnt orange, brown. Might do some washes to give some additional depth to parts of the pieces. We’ll see how things go.