This topic was brought up on the “Who should have a canon contest?” topic, but it’s better suited here:
On this point, I want to bring something up. Greg has said the Hagah’s Toa colors match their Rahagah colors but hasn’t said anything about their eye colors. As sets, as well as in the movie and comics, they all have orange eyes, but there is one panel from the comics that differs:
Norik, Gaaki, Iruini, and Pouks all still have orange eyes (although this isn’t a problem for Iruini since his Hagah set form has orange eyes). Norik’s Hagah set form has green eyes, although he’s shown elsewhere having red/orange eyes:
But for Bomonga and Kualus in the first picture, they have eye colors other than orange. Kualus has the typical light blue as a Toa of Ice, and same for Bomonga having green as a Toa of Earth. This is also repeated in Comic #24: Shadow Play:
While Gaaki and Pouks are still debatable, I think its safe to say Kualus has light blue eyes, and Bomonga has green eyes, staying with the trends of their respective elements.