Based on a practical understanding of phonology, we have color-coded the place of some letters to facilitate the correct recitation of the holy quran.

This had enabled us to classify these letters within three possible categories to enhance the reader’s knowledge and remembrance of Tajweed rules, they are:

1. The letters which requires expanded vocalization: we used red color to highlight these letters.

2. The letters which is nasalized: these letters are green in color.

3. The dark blue color indicates the emphatic of the letter (R), the blue color indicates the unrest letters- echoing sound- (qualquala), while the letters which are written but are not pronounced are gray in color.