You can define which colordeck(s) will be used for color searching. You can also check if a right colordeck(s) is selected if you see that some colors are missing from the search results. To select colordeck(s) do following:
Go to Settings and select Active Collections.
Select your desired color collection (colordeck).
You can select more than one collection. In order to enable color search for the full database select all color collections.