You can modify an already existing color scheme ?.
For example, if I want to change the color of the active line. It can be done by opening the file ksf?
google translation
You can open Preferences - Color schemes and edit any colors you want.
And please stop posting original messages in Spanish because there are a very small count of people who knows Spanish (and probably no developers/moderators).
In your case you should navigate to Colors tab in the window I named above and change Current line background color.
All right.
forgive me for speaking Spanish …!.
Thanks for answering.
No worries 
Do not the option that you say appears.
Please help me.
Fonts and colors.