The background colors are not shown in the editor, they are only represented by tags.
Available workaround (if any):
N/A. For some cases, In-Context Preview can help a better overview.
Add an option to show background color in both source and target segment in the editor.
In some projects the instructions are to translate or not translate the highlighted text which is only a part of the segment. Having these highlighted parts in color would help Linguists to have better overview as the tags can be confusing (especially, if there are many of them).