That is a great question and I believed I have finally figured it out.
The advertisement for this issue says the strips come in FOUR colors.
The colors noted in the
PSA pop report are
Green
Blue
Purple
...and no color listed
This would indicate red/orange being the same color which PSA does not label as a distinct color.
By the way, I need a Jackie Robinson in any color so if you or anyone has one please let me know!