Which Phenols give the colours blue, green or violet in the neutral FeCl3 test? I have read about the neutral FeCl3 test for Phenols, where a positive test is indicated by the colour of the solution which ranges from green to blue to violet. But which specific derivatives of phenol give a specific colour? Or is it random?
The colour may vary from blue, green or even red depending upon the
  nature of the phenol.(Source)



o,m,p-cresols and resorcinol gives violet or blue coloration. (source)
beta-naphthol gives green coloration. (Source)
alpha-naphthol gives pink coloration. (")