For the physical concept of darkness:
* Shadow
* Darkness
* Obscurity
* Dimness
* Gloom
* Penumbra
For the concept of protection from the sun:
* Shelter
* Cover
* Sunshade
* Umbrellas
For the concept of a type of color:
* Hue
* Tint
* Tone
For the concept of being disapproving or criticizing:
* Disparagement
* Slander
* Criticism
* Condemnation
* Insult
For the concept of an area of influence:
* Sphere
* Domain
* Territory
Please provide more context so I can give you the most accurate synonym!