Change existing theme?

Hi, I see that you’re using the Fabric theme from StudioPress. That theme comes with 3 different color schemes e.g. https://demo.studiopress.com/fabric/colors/blue

You can change the color schemes from the Dashboard → Genesis, scroll down and locate the color schemes option box.

If that doesn’t work for you, you’ll need to edit the theme’s CSS to customize the fonts, colors, everything.

I’m sorry but as you appear to be using a commercial theme, you need to seek support from the theme’s developer/vendor. We do not support commercial products here.
Try https://www.studiopress.com/support