The cat poster blue print. "During ceremonial occasions such as weddings, funerals, baptisms, or religious holidays, clergy often wear white clergy shirts. During a ceremony, the white shirt is usually worn under a cloak or robe, but not out in public. This color clergy shirt is also paired with other colored priest collars that correspond to a season or a specific type of occasion." (https://mdschurchsupplies.com/blogs/news/the-meaning-behind-different-colors-of-clergy-shirts)