On a spectrum ranging from green to maroon, New Delhi achieved Vantablack status in the early hours of 8 November 2018.
Different countries may have different parameters for measuring air quality index (AQI), but the colour codes are standard: green is good. Yellow, moderate. Maroon straddles anything from ‘hazardous’ to ’emergency’. But what colour do you associate with an AQI of 2000 (so off the charts, one can only liken it to a forest fire) when the hazardous limit in India is 500?