Well I think I answered my own question, which disappoints me at the same time!
I plugged the HDMI connection into my LED TV (Sharp 60")...no color issues at all.
Looks like my converter is the culprit!
Which leaves me searching for a new converter since the NUC doesn't have an audio output jack as this HDMI to VGA/Audio Jack out did. It worked for quite some time, so why it failed now remains a mystery