How to utilize if/else condition for JSON column formatting in SharePoint?

Question

I am trying to format the color of a column based on the selection of another column in the same View. But, I am having trouble writing the JSON to check for multiple values in the other column. Here is my code so far that only checks for one selection, "Red". I want it to check for the other possible options, which are "Green", "Blue", "Amber", and "Gray".

{
  "$schema": "https://developer.microsoft.com/json-schemas/sp/column-formatting.schema.json",
  "elmType": "div",
  "txtContent": "@currentField",
  "style": {
    "background-color": "=if([$OtherColumn] == 'Red', 'red', '')"
  }
}

Answer 1

You can do it similar to that in Excel :)

You can checkout the below sample to get an idea:

"background-color": "= if([$OtherColumn] == 'Red', 'red', 
if([$OtherColumn] == 'Green', 'green', 
if([$OtherColumn] == 'Amber', 'amber', 
if([$OtherColumn] == 'Gray', 'gray', 'blue'))))"