Craigrkirkby on "Customise H1 title and Widget Titles on Ascetica"

Using CSS, how can I change the colour (and size) of the H1 title and Widget titles?

I've tried the usual

h1 {
color: rgb(21,52,79);
}

widget-title {
color: rgb(21,52,79);
}

And this didn't work.

http://www.worklifechampions.com.au

Thank you.