Oh yessss ... for the Green ...... with envy, as I am loving it.
I love how the green is making the blocks pop.
Whereas using the same fabric just loses all your beautiful work of the octos.
Likewise the cream is just ... blah!
Have you considered? ... further squaring the blocks up with the green as a sashing
along with the corner tris you have already added?
Then use the terra cotta or burgundy in the fabric as cornerstones.
Would let each of those beautiful octagons float and show their stuff ...
plus create a secondary pattern.