Replacing a Coloured Background
Let’s replace a coloured background that’s been dropped.
Here in the Original pane is the text box whose yellow background was dropped. 
It could be replaced with Screen Capture, but the text would be inaccessible, because it would be part of the image. 
We can replace the background using CSS.
First we go to the HTML source and insert DIV tags round the text. 
Next, we select the DIV section of code using the Path feature.
Then we add a new style, which we can give the semantic name “Summary”, as it’s for a case study summary box. We use the Color Chooser to apply LightGoldenrodYellow to the background. To safeguard accessibility, we also include a contrasting foreground text colour setting in the style. 
The background colour has been replaced successfully.