From my own reading experience, I found that individually lit "RGB" clusters tend to be white, wherease "GBR" is fuzzy(?) and "BRG" tends to appear purple on the left but green on the right. This is because the green subpixel contributes most to perceived brightness. I think it's fortunate that most displays locate them in the center.

I tried reproducing the results using actual Cleartype with black lines on white backgrounds, and "orange-blue" vertical lines appear blurrier than "black" vertical lines.