@eumrz I was right, you will find Edit CSS in the design/theme section, in there you can add something like I did (see below) change the link colour to whatever.
/* Light Mode */ :root { --text: #666666; --link: #ef4f49; --link_visited: #ef4f49; --accent1: #333333; --accent2: #666666; --background: #ffffff; --code: #e3e3e3; --button-text: #ffffff; --blockquote: #fffee0; --note: #FFFF00; } body { font-family: Avenir Next; }