The final answer is
Society
The title seems to be a reference to the KTaNE manual, in which each section begins with "On the Subject Of.."
Step 1
As a starting point, it seems like
all the clues should have answers referencing a colour, but not necessarily the colours in the image below.
1995 surfer film starring Catherine Zeta-Jones
Blue Juice
Atmospheric effect where solar radiation is trapped
Greenhouse, courtesy of @dcfyj in the comment below
Cocktail made with peanut liqueur
Brown Bomber
Result of a punch in the face
Black eye
Seneca chief Otetiani's nickname
Red Jacket
Superhero played by Chadwick Boseman
Black Panther
Valve promotion including Portal
Orange Box
Step 2
Now
We need to go deeper. Each of the answers has a word that can be commonly associated with another colour, this time from the image. We associate the words with the new colours, in order, and take the nth letter from each word (e.g. white is first, and we take the 4th letter from the corresponding word)
If we list the colours in order:
White 4
House (from #2), S
Black 2
Box (#6), O
Yellow 3
Jacket (#5), C
Orange 3
Juice (#1), I
Blue 5
Bomber (#3), E (had to Google that one, was stumped!)
Pink 4
Panther (#6), T
Red 2
Eye (#4), Y
All of which spells out
Society
Thanks to @dcfyj for the answer to #2, which also helped point out that I was heading down the wrong path initially