Template Dalet 4 - Link CSS Style

I would like that the links in an article look different from the text to invite clicking. What should I indicate in the link css style option please?

Or do I have to select a style in the editor? and if so, I do not see that the colors in my template are consistent with what is shown as an example in the dropdown list when I look at the style in the editor.

Thank you so much for your help ~ Laurence