If you're looking for city travels then surely you can visit Rajasthan, or if you're looking for more adventures then Uttarakhand is your answer but do check respective state policies and guidelines for inter state tourism before visiting.
You can visit Sikkim for sure.. they have lockdown as soon as Corona starts spreading, They have closed all touristy things I think till Oct'20. After Oct. you can visit sikkim
I guess you should not visit anywhere in this situation let it be green red or orange zone whatever you don't know whether person is positive or negative
stay home stay safe