i will suggest looks
Delhiite takes safety seriously u can check them out
Geetanjali salon is taking a good safety measures dese days.
Looks and Geetanjali, but they are pretty expensive. You can colour you hair in home only using streax L’Oréal packages, easy and affordable!!
You can try Looks ,Jawed Habib .
We can't not say a particular saloon the best because every saloon has something unique, as if nowadays I think everyone is taking proper precautions and has proper sanitation.