Changing the colour of the font within a course

Hello, 

When changing the theme within a course its very easy to change the accent colour and the style of the font. However when trying to change the colour of the font, each bit of text has to be changed individually.  I was wondering if there was  a way, or if it could be implemented that there is a setting that would change all of the texts colour within a course. 

Thanks for your time! 

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