@prometheis666 In Easy Set-up, do you see the Configuration link to the right of the section title Theme? After clicking that you can choose from the listed colors or toggle Advanced to use your own colors.
The arrangement of the colors seems misleading to me - the Dark theme (the original style) uses the Primary and Secondary colors, while the Light theme uses the Primary Light and Secondary Light colors. If you want Red and Black that would mean using the Dark theme with a Primary of Red (and whatever Secondary you think looks nice - you'll see the Secondary used in the configuration panel itself).