Print Color Objects But Not Objects That Are Highlighted / Colored For Input And Grids?

So I'm creating a grid worksheet for engineering calculations and I have a couple questions about the best way to do it. I've been messing with excel for my calcs for about a decade now, and I every once in a while I try and improve them.

First: I will have several input areas that will either be colored text or shaded background (either works for me). I don't want these 'input required' objects to print as color, just black. But I want my logo at the sheet top to print as color. I've only found ways to not print any color. Can I print the logo as color and the 'input required' stuff as black?

Second: When I do calcs by hand, I write them out on 10x10 grid paper. Each 10x10 grid is one inch. In the past I've created this grid out of the cells, which works. I frequently need to change formulas around though, and each time I do this, I end up needing to mess with the grid cells also. Is there a way to create the grid and have it in the background so it doesn't need to be adjusted each time I change formulas? I wan't the grids to print, and also want to see them on the screen, as I sometimes draw simple objects along with the formulas.