Colour of new nametag (7)
I believe the answer is:
magenta
'colour' is the definition.
(magenta is a shade of purple)
'new nametag' is the wordplay.
'new' is an anagram indicator.
'nametag' with letters rearranged gives 'MAGENTA'.
'of' is the link.
(Other definitions for magenta that I've seen before include "A crimson dye" , "Reddish-purple colour" , "Name tag (anag) - colour" , "fuchsia" , "Colour named after a bloody 1859 battle in Italy" .)