Hi,
To start, it's a good thing to obtain and learn
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. You'll quickly learn to love its ability to test CSS and HTML changes, seeing the effect live before full implementation.
The key with coloring the background of a text widget is to assign a new, unique class to the widget like this:
<div class="myuniquewidget1">YOUR CONTENT</div>
Then, you can create customized CSS code to coordinate, as in this example:
.myuniquewidget1 {background-color: #cbdcc4;}
Note: Hex color codes are six characters, not seven.
You can also use more generic code like this, but it may affect other text widgets you may use elsewhere in the site:
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Additionally, I'd like to point out that search engines don't like it when a site has more than one H1 tag on the page. Thus I don't recommend using it with inline CSS in your text widgets or elsewhere. Instead, it's best to create another unique class for select text that you can style like this:
font-size: 3.75em;
Actually, this works better for you in the long-run, as you have a number of additional CSS options you can apply to text to grab the attention of your visitors. This site will show you how to do creative, quality CSS, including a wide number of options for fonts and text.
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Custom code may be added to your site via Dashboard > PageLines > Site Options > Custom Code in the CSS Rules area. Alternatively, if using it, in the style.css file found inside the PageLines Customize plugin or, if using a child theme, in the style.less file within the child theme files.
Quite a bit of your inline styling is redunant, such as <strong style="color: #4ea5dc;"></strong> which contains nothing. Extraneous code only adds to the page load and slows your site. I recommend not using inline CSS, but custom code instead. This way you can apply the CSS where you want it using either a class or ID. You'll find more about that in the W3Schools site linked above.
Welcome to the PageLines Community. I hope this helps you with your very nice looking site!