You wanna make your blog's Widget Title & Heading background colourful, There is a simple method through which you can easily add a background colour in your blog's widget Title.
How to Customize Widget Title colour and Background Colour
All you have to do just click on Template button on right side of your blogger dashboard and click customize button. Now blogger template editor will be opened,Click on Advance and scroll down and click on "Add CSS". Now paste below code in CSS field.
widget h2.title,.widget h2{
background-color: #4376b1;
color: #ffffff;
height:30px;
}
Here in this code you can change the value of colour codes to put your favourite colour. Yellow highlighted code is for changing title's background colour and Green highlighted code is for changing title's colour.
The changed background colour of widget title will also be applicable for Heading Tags of your blogger Posts. When you will create posts and put heading on it then same colour will be in heading background.