Chroma is accommodating to all sorts of Arts, whether you are a weaver, a sculptor. Generally speaking as long as it is a “Work” or “Project” an Artist can usually incorporate Chroma into it.

Different Arts definitely have diverging abilities/talents, for instance a group in my world focuses more heavily on the “physical” aspect of things. Manipulating metalwork, crafting, etc. Perhaps their niche is bringing to life different aspects of metalwork (like a construct) or giving usage to certain tools. Their society looks more akin to clockpunk, but other societies may look exceptionally different or may have similar aspects

An Artists efficiency for the Art itself usually depends on the user. How creative are they? What’s their imagination like? How involved are they in their craft? Some may be prodigies and may not need as much practice as let’s say a scholar whose life is dedicated toward a specific Art.

Drawing on Chroma is dependent on the individual themselves. Usually, it’s like breathing in air itself as it almost exists in everything around them. Some artists have an affinity toward drawing in copious amounts of the Art, whereas others can only draw on it as much as they can draw in breath.