Much like how wyrmwight are the cousins of dragons, a kobold is a much more distant cousin to a dragon. Much like dragons and wyrmwight, you'll find kobold of manny different colours. Though unlike other draconions, their colour has no real dictation on the sorts of things they do, it is simply a vestigial morphismism.
Though kobolds do still tend to feel the pull towards draconic tendencies. For example, kobolds are naturally drawn towards the presence of a greater dragon. When a dragon abandons its egg or dies before hatching, kobolds tend to move in to help care for the egg and the hatchling. Aside from the lure of draconians, kobolds also have a tendency to hoard, though usually they're just trinkets and not actual valuables. And despite their diminutive size, they still have a full sized elder dragon's pride.