\maketag@@@ macro, which is responsible for producing equation numbers in
amsmath, is defined as follows:
You can see that it sets
\normalfont but doesn't alter the font size, so in your case the number is also in footnote size. To change the size of all equation numbers back to the document font size, add the following lines to your preamble, after
You can also replace
\normalsize with any other sizing command, of course.
Note: please add a minimal working example (MWE) next time you ask a question. In particular, you didn't mention that you were using the
xcolor packages, and that you defined a new color
1. This made your code harder to read.
A drawback of this approach is that
\eqref macro also formats references using
\maketag@@@. So if you don't want these references to be typeset in
\normalsize, you could for example also redefine
\eqref. To do this, use the following code fragment instead of the one given above:
Then, everything you define as
\my@tag@font will be used for equation numbers, but discarded for