Problem HTML and CSS in word press

[Hail]

I am using word press for my websites. I am trying to change color of header and footer. when i try to past HTML and CSS code in word press, it does not show any changing in header and footer. what is the best method? Need help. site bestmassagechairdesign.com

[mshamim akhtar]

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[Kurthis Banu Abdul Majeeth]

Hi Hail, 

Kindly share us more detail about the reported problem such us input word documents, screenshot or video demonstration of the reported problem, which will be helpful for us to investigate further and provide you the solution at the earliest.  

Regards  

Kurthis Banu A.