Color picker for custom R HTML visual gives wrong color in R.

[Anonymous]

Here I showed how to include a text input and a dropdown list in a custom R HTML visual. Now I've tried to include a color picker. I entered the following node in capabilities.json:

"Color": {
  "displayName": "color",
  "description": "color",
  "type": {
    "fill": {
      "solid": {
        "color": true
      }
    }
  }
},

This indeed produces a color picker. But then, except for black and white, the color received in the R script does not correspond to the color chosen in Power BI: 

Is it a bug or am I doing something wrong? If this is a bug, where can I report it?