Editing your output style’s citation can give you the bold option, but colors are not an option.
If you select all the citation text in the template and use the apple+B (I think that is the keyboard combination on a Mac) - or find the font tools for the templates (I seem to remember they are not as obvious as in the Windows version of Endnote), you can bold the citation. I applied the bold font to the citation template in the attached output style so you could see how it looks.
(added in edit, – if the font attributes you select are unique in the document – maybe Bold and underlined, you can run a replace formating and change it to Bold and Blue just before submission after removing the field codes IN A COPY).
Cell bold citations.ens (12.9 KB)