The following Ministry of Labour, Training and Skills Development (MLTSD) link does a good job of breaking down the requirements by region and colour:
COVID-19 response framework: keeping Ontario safe and open | Ontario.ca In addition to the Provincial health measures, various municipalities and local medical officers have added their own regional restrictions or requirements (all regional restrictions/requirements are also noted in the above link).
If you are an employer creating your COVID-19 Workplace Safety Plan, the following link is a great resource from the MLTSD, which also provides a free template:
Develop your COVID-19 workplace safety plan | Ontario.ca
