(25 Mar 2025, 1:09 am)Rapidsnap wrote Prefer to call it the Dark Despair livery.
Also when I think if Steel Blue, is the shade of blue they used on the special British Steel liveries painted on Class 37 or Class 60 like this one here - https://www.flickr.com/photos/locohunter/6842425539
The shade looks fairly close to that used on the Optare Solos new to Carlisle in 2015.
https://www.flickr.com/photos/emdjt42/22643155936