That's a very interesting perspective, man. I would describe the intro riff as more melancholy or pensive, with some bluesiness to it. And the bridge kicks in with a very major chord / positive / feel good kind of vibe. All of which is, to me, the antithesis of darkness.
Cool, there we have it again: Visual attributes put to music can be so misleading ...there was another thread here in the forum not long ago with many examples.
Nice discussion though. For me "dark vibe" doesn't have any negative sentiment. It's not depressive, not sad or whatever. Nevertheless for me that tune is rather something I would choose after sun went down than in the morning or the afternoon. Translate "dark" to "in the night, when it's more quiet outside" and it might fit as well.
...tends to have a positive vibe
No doubt. And usually even the hard riffs turn out with very nice epic choruses and so on. All good with that
And I really like Franjoe30 's songs a lot. He knows