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:
... London Institute
Madame Tussaud's
Museum of Moving Image[?] (MOMI)
National Gallery
National Portrait Gallery
Natural History Museum[?]
Science Museum
Tate Gallery: ...