C6 chord
C6
C6 is C major plus A
Spell it C–E–G–A. The triad gives you major clarity; the major sixth (A) adds sweetness. It is not a seventh chord—there is no B or B♭ in the basic quality.
Open ukulele tuning is already this chord
Strike all four open strings on gCEA and you hear G–C–E–A: a C6. That is why the instrument’s “empty” sound feels so friendly, and why C6 sits naturally under so many beginner strums.
C6 vs Cmaj7 vs C7
Cmaj7 adds B and floats. C7 adds B♭ and pulls toward F. C6 adds A and stays sweet without that dominant lean. If a chart says C6, swapping in C7 will change the sentence under the melody.
Useful as I6, not only as a trick ending
In C major, C6 can colour the tonic. It also works as a gentle decoration when you want major harmony with more ring than a triad but less gloss than maj7.
The sweet, slightly old-fashioned side of a c6 ukulele chord
C6 sounds like major with a smile—brighter than a triad, softer than a dominant, less “jazz hotel lobby” than Cmaj7. It shows up in Hawaiian-flavoured strums, vintage pop, and anywhere a writer wants C to feel finished without parking on a hard final major.
Moments players grab C6
- Island-style or beachy strums where open-string chime is part of the vibe.
- Music-hall and early pop charts that print C6 as a pretty stand-in for plain C.
- Quiet endings that should feel settled but not abrupt.
- Fingerstyle intros that want a major colour with a little extra ring on top.
Teaching and arranging notes
- Showing beginners that standard gCEA tuning is already a C6 sonority before they fretting anything.
- Swapping a static C bar for C6 when a vocal needs a sweeter bed.
- Splitting parts: one uke on an open-area C6, another on a tighter mid-neck grip for depth.
- Reading charts in C where I6 appears as a colour chord between verses.
Hearing the sixth so C6 does not collapse into C
Follow the board above. C6 only earns its name when the A is present with C, E, and G. Miss the sixth and you are back on a plain major triad—even if your fingers feel busy.
Aim the neck the way you hold the uke
Rotate to horizontal or mirror for left-handed view before you fretting-hand copy anything. C6 shapes often mix open strings with fretted ones; the photo should match your eyes.
Protect the open strings the shape needs
Many friendly C6 grips leave G, C, E, or A ringing. Arch the fretting fingers so a knuckle does not kill the open note that is carrying the sixth—or the root.
Solo the A, then rebuild
Pluck the string that supplies A alone. Then add the rest of the chord. If that A disappears under a strum, the grip is lying about being C6.
Use a lighter strum than you would on C7
C6 is a sweet colour, not a push chord. A softer wrist keeps the sixth audible instead of washing everything into a generic major noise.
Visual ukulele view with a fretboard you can turn
See the sixth on a real neck
Markers sit on a photographed fretboard, so you can spot which string is carrying the A before your hand guesses wrong.
Rotate or mirror the board
Horizontal layout and left-handed mirror keep the same C6 aligned with how you actually look at the instrument.
Finger numbers stay readable
Coloured, numbered dots help you keep a plan when you move between open-area and higher grips.
Chart link for nearby harmony
Hop to Am, F, G, or C on the full chart when you are mapping a progression, then return to this larger C6 view.
C6 questions worth answering once
Q1.What notes are in a c6 ukulele chord?
C, E, G, and A. On the uke those pitch classes can appear in different octaves; you need the major sixth (A) present with the C major triad.
Q2.Is open gCEA really a C6?
Yes. Open strings sound G, C, E, and A—the same pitch classes as C6. Fretted shapes rearrange those notes; they do not invent a different quality.
Q3.When should I choose C6 over plain C?
When the chart writes C6, or when plain C feels too plain for a sweet verse or a soft ending. It is a colour upgrade, not a harder chord for its own sake.
Q4.How is C6 different from Am7?
Am7 is A–C–E–G—the same four pitch classes as C6. Context and bass emphasis decide the name. On ukulele the voicing often overlaps; the chart’s root tells you which function the writer meant.
Q5.Why does my C6 sound like a muted mess?
Usually an open string is getting touched, or the fretted A is weak. Check the visual shape string by string, free the open notes, then strum lightly again.
Making C6 a habit, not a one-off trick
Once one grip feels easy, play a short loop that alternates C and C6. The difference is mostly that singing A on top—train your ear on it and you will stop grabbing random major shapes when a chart asks for sixth colour.
Because open tuning already speaks C6, treat fretted versions as ways to move that sound up the neck or thicken it. That mindset keeps the c6 ukulele chord useful in arrangements, not just as a trivia fact about open strings.