Hello Javier Martinez,
Thank you so much for using our theme SuperMagPro.
All the options for theme are available on Appearance > Customize > Layout/Design Options and you will find the Basic color options and Advanced Color Options.
If you already tried this, and no any effect is happening, it may be conflicts with the plugin. Have you installed any plugin for color related options ? Please try once by uninstalling one by one plugin and try to find the plugin which is causing issues.
Let us know, if you faced any problem.
Regards,
Acme Supports