A list of the Pernese Dragon Eye Colours that appear in the entire series.
Red: Anger, Hunger(Active Appetite), Fear, Mating, Pain, Excitement.
Red/Orange: Mating, Alarm, Eagerness, Arousal.
Orange: Uncertainty, Suspicion, Anger, Mating, Alarm, Hunger, Agitation, Panic.
(It would appear that Red and Orange are quite interchangeable, and the same could be said for Green and Blue, which are "Happy", "Content", "Pleasure", (and lots more words like that)and "Normal" colours.)
Yellow: Anxiety, Fear, (Reproachful?) Worry, Excitement
Pale Yellow: Concern.
Green: (See above) Delight, Tranquility, Placidity.
Blue: (See above) Longing, Interest, Mischief, Excitement.
Grey: Great Worry/Stress/Sadness/Pain (Grey tones come to a dragon's hide too).
Menolly mentions in Dragonsinger (Page 174) that "
the green is dominant, which means sleeping pleasure. Red means hunger, blue and green are sort of general shades, white means danger, and yellow is fright." The DLG states "Green or blue registers contentment, yellow signals alarm and red means anger."
Red-Yellow is the Battle hue. Red and Yellow are also mentioned as "Annoyance". Purple is also mentioned three time, with Red-Purple indicating a clutch, and Blue-Purple meaning love and devotion, while Purple and Blue are used on page 33 of Renegades. "Sleepily Golden" is another colour, and Pink is used on page 336 of Moreta. "Murky Colours" are generally bad things, "Darkness" mentioned as sadness, and, in one case, Nemorth's Keening for her mate is described as "...eyes whirling with the muddy purples shot with orangey yellows of extreme distress."