Yes there is an ID for dropdown options. You can find it by doing inspect element in your browser ..
.. by going to Jira Administration | Issues | Custom fields | Custom field's Configure option (under Actions) | Edit Option (under Options) and then hovering your mouse over the Edit (under Actions).
I hope it helps.
thanks for solution.
can you tell me how to refer to this value in Json.
suppose my custom filed name is Color ( Id :1500) and having value Blue ( 1200), green( 1201) , yellow( 1202).
to refer to Color we will use "customfield_1500"
what reference value should i use for Blue , green and yellow.
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