Color: None
Location: Sanctuary Province
Domains: The Temple of The First teaches tenets such as love and generosity, but the pillar seems to accept all followers, even people who are hateful or greedy. Each person may have their own interpretation about what the pillar stands for.
Background
As the name implies, The First is believed to be the oldest of all pillars. It is by far the most populated pillar on the continent, and does not seem to follow many of the conventions that the rest of the pillars are known for. It does not retain any particular color, and instead changes color periodically, sometimes displaying a pattern or an image. It allows anyone to attune, regardless of background, beliefs, or abilities, and seems to have an unlimited capacity for new followers. It also does not have a Sentinel, unlike other pillars, though it does have an Archon.
There is a strongly organized religion based on The First which is extremely well funded and has massive influence throughout the continent. Temples to The First can be found in just about any major city, even thousands of miles away from the pillar itself. There can be, however, political tension within the church such that a powerful faction of the Temple may not actually represent the First's will, i.e. one can hypothetically be elected as the head of the Temple but not become an Archon.
There is a myth that The First protects everyone against suppression. If the pillar would ever be destroyed the results would be disastrous. Suppression would become an easy act. The Archon of the First is granted the ability to bolster one's protection even further against suppression than that which all pillars allow.
Dhynn's is the blueprint for all the pillars of the world. She's also responsible for the protective barrier around the world that prevents easy reentry. A dragon who is away must receive her permission to return, although this has been circumvented once in recent history by Chracio and possibly again by Xisben. It's also said the the First, or its Temple, is where a great many words of power originated, like the one that cleansed the pestilence from centuries ago.
According to Veckra, Dhynn is the mother of all dragons, which is why she is referred to as the first. There's no such father progenitor. This is likely where the source of her suppression countering ability originates. As the mother of all quasith types, she would of course be immune to them all, similar to how dragons can offer protection against whatever quasith their children inherit, i.e. Veckra shielding agaisnt the inherited white quasith of Equinos.