• Yellow is reputed to be a response colour.
  
  
• Be careful using red, apparently there has been some research which found middle aged and older people find red hard to see. Also, in support of this, accident figures are supposed to be higher for red cars.
  
  
• Colour can be expensive! Shop around printers. The differences in pricing can be astonishing. Literally! You will be astonished.
  
  
• Are you selling something coloured, where prospects need to see the product in all it's glory?