From this question I found the following sentence:
I was wondering specifically about 赤く＋ではなく. Does ではなく just attach regardless?
The question described ではなくas だ＋は＋ない using their connective forms. But with い adjectives and adverbs, 赤いだ and 赤くだ aren't ever used, riight? Or does that just not matter?
I don't really see any alternative, but perhaps would 赤くてはなく (is not red but) or something similar work?
Thanks, and sorry if it's an easy question or repeat