I’ll assume you are referring to this person’s problem:
https://shortcircuits.cc/forums/topic/1-column-not-showing-blue/ (link provided for others to find easily).
Could you post a picture of the fault to this thread (via the insert/edit image button I just added) showing the board with all columns and rows in blue? A picture of the back of the board in as high resolution as you can get would also help.
A copy-paste of your void(loop) would also help.
A mixture of red and blue is strange, as they are on different shift registers and the red and blue pins on the LEDs are the two furthest from each other. This will be an interesting problem to solve I’m sure.