How do I know what CCS I want to change?
Learning how to use the web developer and chaging your css ( part 1)
FindWeb developer>Inspector in Firefox tools
Click on the area that you want to find. in this case it is a class:
"entry-content"
so the CSS would look like this.
.entry-content h5 {
font-family: Arial, Helvetica, sans-serif;
font-size: 18px;
color: #F90 !important;
;
}