What is the usual significance of the first colour named in a tertiary colour?

Correct answer: It indicates the colour's dominant bias

The first colour in a tertiary-colour name usually identifies the dominant hue influence or bias. For example, in red-orange, the mixture is understood as leaning toward red more than orange, so red is named first. This naming convention does not describe value, brightness, or the amount of white added. Those are separate properties controlled by lightness, saturation, tint, or shade. Therefore, option A correctly describes the usual significance.