I agree with the safety aspect of using dark colours , the danger being you are potentially camouflaging yourself , when really you want to be doing is the exact opposite !
Re Steampunk. I am in no way am expert here, just something I have come across doing other hobbies ( model engineering mainly) , also different people interpret it in different ways. My interpretation is its an art form where subjects are 'enhanced' with an alternate reality , usually a 'what if' scenario involving Victorian engineering. For example this site has images of what a Victorian computer might have looked like if they had access to modern technologies http://www.datamancer.net/ There is also a strong art movement on this theme, which I find fascinating - just google 'steampunk art'. Some people also get into costumes on this theme , but I am not interested in that ! Not to everyones taste but relating this to the M3W , it strikes me the modern Morgan 3W is unashamedly a modern rehash of the original using modern technology to advantage, which ticks a lot of steampunk boxes. So seeing the M3W as a modern machine with strong heritage, to emphasise that heritage as a machines of its time ( early 20 Century when machines were most likely big/black/dirty ) , matt black has a strong pull for me. What a long winded way of saying I like matt black ! Doh Red it is then !