* Traditional Collective Nouns: Collective nouns refer to a group of things (e.g., flock of birds, herd of cattle). "Shade" isn't typically used to describe a group of something in the same way.
* Metaphorical Usage: You *could* argue that "shade" *can* be used metaphorically to describe a collective entity, but it's not a common use. For example, someone might say "a shade of sadness" to describe a group of emotions.
Alternatives:
* "Shades" as a Plural: The plural "shades" can describe multiple colors or types of shade.
* Specific Collective Terms: If you want to talk about a collection of shade, you could use phrases like "a patch of shade," "a canopy of shade," or "an area of shade."
In Conclusion:
While "shade" isn't typically considered a collective noun, it's possible to use it metaphorically to describe a group of things. However, it's best to use more specific phrases to describe a collection of shade in most situations.