(THAT'S) OKAY WITH ME.
(That's) okay with me.: translation
(That's) fine with me. & (That's) fine by me. & (That's) okay by me. & (That's) okay with me.
That is agreeable as far as I am concerned. (The expressions with
by
are colloquial.) •
Sue: I'm giving away your old coat. Bob: That's fine with me.
•
Sally: Can I take twenty dollars out of your wallet? Fred: That's okay by me—if you can find it, of course.