[ap526]

When I open certain files, and any time I open a new file, the color palette in Excel displays different colors than the default palette. It doesn't work to reset the palette.

If I open a file with the weird color palette while one with the regular color palette is open, it changes both to the weird color palette.

If it happens the other way around, and I open one with the regular color palette after the one with the weird color palette is open, nothing changes, and in fact the weird color palette will change back to normal and I can save the file and everything is good.

I have a blank Excel file I named "Default Color Palette" so that I can do this every time I open a file with the weird colors, but a lot of files seem to be affected and I use a lot of color coding and conditional formatting.

Does anyone have an idea why this could be happening?