Thanks. I have added a closing bracket and restarted. There is no change.
First, an image showing the colour set in userContent.css when only two letters of the search are typed. https://imgur.com/fLdLN5b Secondly, an image showing the colour change to white when I type the third letter of the search. I expect the colour to remain as set in the css code. https://imgur.com/XqiZ1Wx Thirdly, an image showing the same colour change when I choose to show only altered preferences. https://imgur.com/kYlb9QR