I imagine when Ryuk came in he didn't have to keep from screaming, he had to keep from laughing. XD Long, gangly clowns? Nah, that's not so scary. But, apparently hot, blonde fashionista boys ARE scary. And also outside. But long, gangly clown-things? Noooope.
Is there significance in his numbers changing color? XD Is he not human?
Well, in my backstories for Near, he has red eyes because it's my personal belief that he's a full fledged albino but started wearing contacts by the time he went to Whammy's, as a way of leaving his past behind him. The stories go into more detail about that, though.
Once I start making character sheets/concept art of those stories, you'll definitely see some fanart of red eyed Near then.