JQL search to specify a single option in a Multiselect?

[Steven F Behnke]

Is it possible to write a query that pulls up only issues that have exactly the specified option in their multi-select field?

I have a field, let's call it Color. It's populated with Red, Green, and Blue. Some of the issues have Red and Green, some have Red and Green and Blue, some just have Red. I want a query that pulls up ONLY issues with Red selected in the Color field, no Red and Green and no Red and Blue.

Now, I know I can do something like: "Color" not in (Green, Blue) to pull only Red issues. However this doesn't solve my problem, because my Color field has about sixty potential options. The query would become unwieldy.  "Color" not in (Green, Blue, Yellow, Purple, #234343, Orangred, etc) Furthermore options are added regularly so this would require these JQL Queries to be modified each and every time. 

Is there a better solution?

[Geert Graat]

Hi,

You can create a scripted field that returns the number of selected options as suggested in this comment and then use that field in your query. So if you call the field numberOfOptions than it would look like this:

Color = "Red" AND numberOfOptions = 1

Regards,

Geert

[Steven F Behnke]

I have upvoted this answer as it fulfills the requirements but I await further help as an additional custom fields are frowned upon for the JIRA instance I am working in.