wks with 3 columns, set value for these three columns.
set format of col(c) to color and make some row color is missing(invalid RGB)
make 2d scatters plot with col(b)
open PD dialog, go to symbol tab, set symbol color to by point: direct RGB: col(c)
click OK
==> the invalid RGB is black color in the plot, which should be fill None.
Fixed in Origin 2022b.