The kind of conjunction that would complete both blanks in the sentence is a correlative conjunction, such as - both... and, neither... nor, etc.
Some might experience per say an emotional high and low. Colors can also have a play in this. Usually a sunset goes up with soft colors but when the sunset starts to go away, all is lost and more harsher colors come into context. As in with the more softer colors, you feel relaxed and carefree. Wit the harsher colors, you feel angry and sad.
I don’t know ♀️ what the point is
In addition is the transitional word phrase.
