I think it looks terrific!
I didn't notice where the blue ran at all until I read your post about it. Even looking close up at it I think it's hardly noticeable. If it bugs you (and really you're the 1 who matters..And like most of us, we tend to see our own "oopsies" more), you could say it's a snowflake that's melting a lil.
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Someone recently shared the link to this pattern and the other blocks that make up a seasonal quilt. Or like you did, make them to display individually each month. They're all free patterns, too. Very generous!
http://appleavenuequilts.blogspot.co...-of-month.html