You can do a calculation to check if the Unseen Dimension is Positive or Negative and drag it to the Color Area.
If you are wanting to only add the color to the Unseen Column you could do multiple columns like this:
I provided both examples in the attachment.
test1.twbx 228.9 KB
thank you for replying to my question but is it not possible to just do color for the dimension total unseen rather then having it as measure value??