i would like turn my backgorund, which is white, into a dark grey. but i do not mean the background where text is.
this is my site>>> http://www.iranicum.com
and i want to have the white backgroundcolors changed into grey like this >>> http://demo.colorlabsproject.com/arthemia/
what do i need to do step by step to turn the white backgrounds into grey as you can see it in the example?
be aware that i am a beginner and still not so familiar with coding language and terms, so please be patient :)