The attached photos look like Green-winged Teal. Yes, the speculum appears bluish or purplish, but that can depend on light angle (and the photo/camera settings). There should be a pale border at the leading edge, but that could be obscured by feathers. The outer part of the speculum is black on these birds, and the beginning of that is seen.
One of the key things to look for on hen-plumaged Green-winged Teal is the little slash of white (or buff white) at the base of the tail on the under tail coverts. This bird shows that well. The dull grayish-yellow legs, petite bill, and underparts pattern are all features typical of Green-winged Teal too.
If one wants to see bluish in the speculum of a Green-winged Teal (and their Eurasian counterpart), look at these photos:
http://vancouverislandbirds.com/mar24gwteal1.jpg
https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg5ae-8RAAseV3LXDasb6SbpBWGj6INFNhnN0_JVy_Y7agm72MZqrwN8h6yclpyTLX2GFT6v4l_ru5X_RWul75NNnJ3ptNnRR6ZT8ptmQny-5WGSD9TNWeVbklqXO3Bq-Wy9HcX0XW8Bk6b/s1600/teal+2.jpg
Louis Bevier
Fairfield
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