As the cell is Mtext you can set each line a different color, using the mtext color control. This was done manually. So will see maybe later will have time to do something. Have an idea will find the cells with multi line split into multi text lines, display the line and what color it is now so you can change any or all lines.
Looking at dwg it looks like you only want 2 colors 1 & 87 so will keep the multi color for later.