Idol clothes, uniform and matching outfit

Should group idol clothes be mutually exclusive to uniform and matching outfit? If not, should it be considered an uniform or matching outfit? I'm leaning towards uniform.

I also lean toward idol clothes, because it has same style (and colour) - worn by multiple personnel members of an idol group. Especially because certain copyright has a canonically-established design. But it does not always have to be uniform. Matching outfit is only reserved for non-uniform ones.

What makes sense to me is:
idol clothes +uniform for stage outfits that are standardized among members of an idol group, taking into account any established canon designs of the copyright as well.

idol clothes -uniform for stage outfits that are either:

• not standardized among a group (the members wear different outfits),
• worn by a solo idol that is not a member of a group (and thus their outfit can't be considered "standardized"),
• worn by original characters unless the image shows multiple characters wearing the same outfit (since otherwise, without an established copyright you won't know if it's a uniform or not), or they're wearing the uniform of an established copyright.

I don't think matching outfit would be applicable for regular images of idol groups (outside of edge cases), since idol clothes are inherently intended to be worn during the activities of a profession. A case where I could possibly see matching outfit working is a non-idol character dressed to match an idol, for example.