Color expression configuration - need experts input

We need experts input to configure color expression for below requirement

By default (or if null) series color should be WHITE (as it is override series), if not then the if NOT in multiple of another reference series then it should be RED else it should be YELLOW (i.e if it is in multiple of reference series)

Illustration::

VAlue is NULL or BLANK :: color is white (Default color)

say Reference series value is 100

If override Series value is 7 :: color should be RED (as it is not in mulitple of reference series)

  If override Series value is 200 :: color should be in Yellow (as it is in mulitple of reference series)