https://www.siliconvalley.com/2021/04/02/covid-indoor-concerts-receptions-conferences-oh-my-heres-whats-allowed-under-californias-new-gathering-rules/

California officials Friday announced updated rules for gatherings, receptions, conferences, and indoor live events and performances starting April 15 that will allow more people to congregate, especially when vaccinated.

The rules are based on California’s four color-coded restriction levels that indicate county COVID-19 infection rates — purple for widespread, red for substantial, orange for moderate and yellow for minimal — which are set to change as more people get vaccinated.