Color schemes: Classic and Tango have unreadable text when a dark GTK theme is applied

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The current line highlight of the default theme causes the text to be unreadable when a dark theme is enabled.

After doing some research i found that the file that causes this is the tango.xml file located in /usr/share/gtksourceview-4/styles

As a solution i would suggest replacing the current highlight color in line 58 of the tango.xml with another value, eg a transparent grey as rgba colour. This can be done in a way that there won't be any visible difference to the current state with light theme enabled.