Yes, there is. You can upload your background image for the Sidebar Headings’ Titles by using the Sidebar Headings Pattern Upload option which you can find in Morphis Theme Options > Skins, Styles & Fonts  page.

The Sidebar Headings Patter Upload option

Alternatively, you can use this CSS code and place it in the “Custom CSS” textarea to change it to a solid color rather than an image pattern:

#secondary .widget-title, .portfolio-meta dt, .portfolio-launch { background: #343434; }