Delete Title Bar

Go into the admin. Click on Appearance > Customize > Additional CSS and paste in the following CSS.

.home .page_header {
    display: none !important;
}

This will hide the entire header area. You could remove the image and add a color by adding something like this.

.home .page_header {
    background-color: red;
    background-image: none !important;
}

Note: the .home before each selector will only apply these to the homepage, because the body on the homepage has class .home. If you want to apply these on all pages just remove the .home, like this…

.page_header {
    display: none !important;
}