Interesting. This is actually not my fault. It seems Bob has changed his colors to match mine for assemblers/elec-assemblers at some point and I missed it. So when you have "Use ShinyBobGFX Assembling Machines" disabled and I DON'T change the assembler graphics but do add the power bars to the original icons, I'm using the old icon color scheme.
I'll remove that option in the next update. In the meantime I suggest you enable "Use ShinyBobGFX Assembling Machines" since mine look better and mk4, mk5 and mk6 are not low res.