That is a tough one Cliff. I looked for a long time. Saw a reference to it in some hobby publication

https://img.comc.com/i/Baseball/1957...&size=original
1957 Topps - [Base] #97 - New York Yankees Team
Courtesy of COMC.com

Recurring print defect on right side of the image border.

Darn John, did you have to find it on a Damn Yankees team card ?

I noticed on these copies of Ron Fairly cards that the lower left border on one copy is yellow while the lower left border on the other copy is blue. The Marty Keough card adjoins at the bottom of the Fairly card and predictably also has yellow/blue on the corresponding lower right edges.

Each copy appears on one edge of their respective slit. In the images of the sheets, there appears to be a white border around the edges, so where do the blue and yellow colors on the edges come from?

a color shift during printing

A color shift from the adjacent slit?

1963 Topps cards that were printed on the left edge or the right edge will have different colors if they are miscut, for whatever reason. Dean's Cards has them listed as variations which I think is ridiculous. https://www.deanscards.com/search?s=...opps+fornieles

One of Dean's Fairly cards is centered 52/48 and still had a sliver of color on the side edge.

I am only seeing Dean show the variations on the four green cards bottomed cards.

With the two cards on the opposite end of the row from the Fairly and Keough cards also having yellow and blue edges would seem to rule out a color shift from the opposing slit. However, a yellow/blue color shift on each of the green rows as Kevin indicated would make the most sense.

Here is another color shift oddity with a green bottomed 1963 Topps card

1954 Topps WB
 

I have read with interest some of the dialogue/speculations about the printing of the 54 Topps, but I hadn't seen this error/variation posted. Here is one scan with Dave Philley having a slit edge mark, and another with a wrong back of Tom Qualters.

Attachment 660052

Attachment 660053

1954 Topps WB
 

I have read with interest some of the dialogue/speculations about the printing of the 54 Topps, but I hadn't seen this error/variation posted. Here is one scan with Dave Philley having a slit edge mark, and another with a wrong back of Tom Qualters.

Attachment 660052

Attachment 660053