Borders and theme colors of cells turn grey when printed to pdf

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Hi All,

As said in the title, when I print a sheet or range in Excel to pdf all borders and cell theme colours turn grey.
I know about the black-white option in the page settings, and turned that off. My printer settings are set to print in colour aswell.
Here is an example of the colour difference: imgur.com/a/3bcGGee

Hope you can help!

Edit: I use Microsoft Office 365 and PDF-XChange editor to view pdf files