Portugal 2012 Colour Coding to aid the Colour Blind
From Stamps of the World
- Issue date: 20th March 2012
- five values
- Design: Miguel Nieva
- Printed by: Joh. Enschedé, Netherlands
- Print process: lithography
- stamp format height stamp height 31mm x width 40mm
- Perforations: 13.1 x 12.9 with cross cutouts on vertical sides
CTT ColourADD Colour Coding System on postal bands and packaging (aid to the colour blind)[edit]
0.32€ ~ symbol for red, and red sector of spectrum (orange to mauve)
0.47€ ~ symbol for blue, and blue sector of spectrum (violet to blue-green)
0.68€ ~ symbol for yellow, and yellow sector of spectrum (yellow-green to orange)
0.80€ ~ symbol for black, and grey-scaling (grey to black)
1.00€ ~ symbol for white, and grey to white scaling
- Note: the CTT (Portugal Post) uses the symbols to represent its normally colour coded rates, red = national mail;
blue = priority mail (Correio Azul), yellow = European mail, and white and black represent the rest of the world
