[Suki]

Hm actually it'd be Sarani kurai

Sarani= even more.
kurai= dark = 暗い

I dunno how to write sarani other than romanji, sorry.

And change has many words, depending on the context. Could be torikaeru (取り替える) if you're raplacing something, aratameru (改める) if you're correcting, etc.

Good luck.