Enforce exact matches on `colorIdentity` fields

Situation

Let me prefix this issue by saying that I'm unaware if this is possible already. I have tried to do this myself and failed, and have seen others' with the same questions/requests as well.

Example

Consider the following request: https://api.magicthegathering.io/v1/cards?random=true&pageSize=1&contains=imageUrl&colorIdentity=U

The intention behind this is to match 1 random card, with an image field, and a color identity of exactly only blue. However, the results will consist of any combination that includes blue. This occurs both with the , and | operators, as well as with the color field. Personally, I'm only interested in colorIdentity.

Is there a way to add this behavior, if not already present?