Export to PDF default font color is blue instead of black

To reproduce the issue:

• Create a Confluence page
• Add a 2x4 table (or any other size)
• Click on Heading Row and after Heading Column
• Add some text on the first row of all columns, you can also take a look on this screenshot:
  
• Save the page
• Export this page to PDF.

You will see on the page that the texts are still black, but on PDF the fonts are in blue.

The default font color on the page is black, however on PDF it is blue.

Workaround:

Select the texts and apply the Black color (or any other color you want) and it will force the use of the color you defined instead of blue.