At the top of each page of the forum is a box with showing the page or topic title which, depending on the style you use, can look uninteresting. This short piece of CSS will add some styling to that area. The image used here are taken from this site

The page title will go from this

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to this, notice the Site News are now matches the breadcrumb styling

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The CSS below will need to be added to your extra.less template

Code: 
.p-body-header {
    background: #36393f;
    border: 1px solid #d8d8d8;
    border-radius: 4px;
    padding: 14px;
    border: 1px solid #3c3f45;
    box-shadow: 2px 2px 2px rgba(0,0,0,0.04);
}
You will need to change the colours to suit the style you are using on your own forum.