Hello Christian,
I am happy you like that simple minimalistic idea. These logos help to sell.
I give you two more options regarding colors. I tuned up the blend in symbol so now its more copperish and shines a bit. I really like it that way as it's not too trendy orange or too boring red.
Then I think the option would be in steel blue blend (next entry).
Copper for me is very good. Logo stands out and it's well combined with the grey. Black doesn't work for me too well. I don't think there is any need to put in another color. That would be distractive.
Waiting for your comments.
Regards
Simon
(This comment references Entry
#102)