Changing Font Color of Titles

Used the following for the header color:

h1,h3,h4,h5,h6 {
	clear: both;
	font-family: 'Oswald', Helvetica, Arial, sans-serif;
	font-weight: normal;
	line-height: 1.2;
	color: #31c42b;

.post-home .entry-title and entry-header .entry-title are the parts responsible in the css. So you could type this into the custom css box:

.post-home .entry-title,
.entry-header .entry-title {
color: #yourcolor !important;
}

I am not sure about this being correct, but you can give it a try.