Stock by Attributes 5.0 Beta (for v1.5.0)

[Defanci]

Hi, I have creinold_SBA5.0_alpha_version1.5 installed on 1.5 and seems to be working fine on my test side. I have 2 attribute for my clothing, color and size. When my size said 40 is out of stock, the dropdown will show only size 38 and 42 , size 40 will not be available for selection, that's very good. But for the color attribute, when my blue color is out of stock for all the sizes, it still show in the color dropdown, how can I configure so that it will not show in the dropdown? Thank you.