Skoda color code way too dark, what do you do?

Good morning, I’m new here and I have almost no idea of cars at all. But I have a general idea of technology and am someone who likes to do most of it himself, even if the result is not so great afterwards. Is always a question of money… Now on the subject: I have a Skoda Roomster, year 2010 in Brilliant silver metallic. He already has some scratches and scratches, but mostly only on the plastic. Now I noticed, however, that on the tailgate rust is pictured et has. But luckily only from the outside. I want to grind this now, prime it, (fill it), paint it and polish it. And then “repair” the whole rest. I know, metallic is always bad to paint, but as I said, the result doesn’t have to be perfect. But I bought a paint pen from Skoda a few years ago with the right color code (8E) and it was way too dark. Ok, the car is old and the paint has changed, but I have now gel I’m sure that the problem is generally with this Skoda shade, even if the car is almost new. Does anyone know this shade and can tell me if there might be a brighter tone? Probably not… Are there other possibilities? Even mixing is not possible, for that I lack the equipment and hire a paintr is honestly too expensive for the car… I hope someone can help me here.