Fb is a major, spelled Fb, Ab and Cb. In Ukulele (low G) tuning (G3 C4 E4 A4) the easiest shape is x442, which sits at fret 2, spans 2 frets and mutes 1 string. 12 positions for it are shown below, from the nut up to fret 11.
Notes and intervals
Note
Fb
Ab
Cb
Interval
1P
3M
5P
12 ways to play it
Ordered by how hard they are to fret, easiest first, one per position on the neck. Fret numbers are relative to the position marked beside each grid.
x442sits at fret 2, spans 2 frets and mutes 1 string444xsits at fret 4, needs a barre across 3 strings at fret 4 and mutes 1 string9877sits at fret 7 and needs a barre across 2 strings at fret 7911011sits at fret 9, spans 2 frets and lets 1 string ring open980xsits at fret 8, spans 1 fret, lets 1 string ring open and mutes 1 string1402sits at fret 1, spans 3 frets and lets 1 string ring openx11011sits at fret 11, needs no stretch at all, lets 1 string ring open and mutes 1 string4442sits at fret 2 and spans 2 frets987xsits at fret 7, spans 2 frets and mutes 1 string9807sits at fret 7, spans 2 frets and lets 1 string ring open1442sits at fret 1 and spans 3 fretsx877sits at fret 7, needs a barre across 2 strings at fret 7 and mutes 1 string
Keys Fb belongs to
Fb is diatonic to 24 of the 96 keys this app knows, playing a different role in each.