Colour: A particular shade of red. To be precise, the range of colours around CIE chromacity x 0.41, y 0.27 to 0.33; depending on your hardware, they look something like:
... Anglia Railway Museum[?]
Strumpshaw Hall Steam Museum[?]
Toad Hole Museum[?], How Hill
Working Textile Museum[?], Derwent Valley Mills
Northumberland
Grace ...