That's certainly not Canadian. Benji is right in that the label colour was a marketing tool meant to relate to the type of music: blue for Soul/Pop, black for Jazz with corresponding light blue and yellow demos. Certain titles existed on both black and blue labels but I don't know quite why. The red demos are just an oddity. Tommy Yates, 'Something's Got To Give' is on both black and blue issues and light blue and red demos.
It isn't simply down to different pressing plants, as all variants of the Tommy Yates I've had or seen come from the same MGM Bloomfield, New Jersey plant. The other MGM singles plant was H.V. Waddell in Burbank, California. These have quite different typesetting for singles.
Sometimes the MGM labels needed to rush-use other pressing plants for big sellers: Southern Plastics, MidWest, Monarch, Allied etc. but the Verve 45s were rarely anticipated to sell out of their original pressing runs: the label was run on very conservative lines, sales-wise. Verve Folkways, for example was specifically started as a tax-dodge which then confounded the MGM board by actually having hits.
It's just occurred to me that red labels with black type would have been pretty difficult for radio DJs to read in low light, which is why most companies used light labels with higher-contrast type colours: white with red, yellow with black etc. An experiment with red-labelled DJ copies would probably have been short-lived for this reason.