ColorADD

The app won the accessibility category of the 2013 Vodafone Foundation Mobile For Good Europe Awards.

[2][3] The code is based on five base signs: two triangles (one angled upwards and the other angled downwards), one diagonal line, one solid square box and one empty square box representing black, white and the primary colors: red (magenta), blue (cyan), and yellow.

Since its creation, ColorADD has been applied in various services, mainly in Portugal: It was also recognised by Buenos Aires University and TEDx Oporto.

Usage must be licensed by the for-profit private company Miguel Neiva & Associados - design gráfico, Lda.

[12] One of the main criticisms of the ColorADD system is that some of the color symbols can be confused if they are inverted, similar to how the six (6) and nine (9) Arabic numerals are mirror images of each other.