Future perfect and future perfect continuous, respectively, if you're interested in the names.

They're both future perfect I believe, of the verbs "to have" and "to be". Future perfect continuous is "will have been filming", this was "will have been fine".

What's the difference between those two?

"Will have been filming" is the future perfect continuous form of the verb "to film", while "will have been blue" is the future perfect form of the verb "to be", with "blue" as a subject complement.

Makes sense, thanks for clarifying.

To give them names destroys the magic a little