Prevent color change open/save sheet?
 

I share an excel file on a network with many uisers on different
platforms/versions of Excel.
When other users open my file and save it, the color scheme of my cell
shading keeps changing. I tried using only the colors listed as "standard"
colors but it does not seem to stop the "color shift".
So when I get teh file back, cells that had been lime green are noe teal
blue etc.