Line numbers in high contrast theme

[patx]

The line numbers have the same white background as the rest of my text (white). It makes it very confusing to look at code that is not indented. The two other themes do not have this issue as they both have a grey pellucid background behind the lines numbers. I think the same should be done for the high contrast theme. I like my white background but you need separation between the line numbers and the text.