This is the palette for the colors used to signal vowels and target consonants. However, since the inception of this website, we have expanded the colors to cover more variations of pronunciation, as is explained in the digital projects section of this website. However, the basic concept remains the same, as outlined here.
Click the image above to enlarge.
Using OpenWayEnglish Colors
As a simple introduction to its use, this YouTube clip shows how the alphabet would be read using OpenWayEnglish.