Examine source code of Heartless Riku

{
  "theme": {
    "images": {
      "theme_frame": "HeartlessBanner7.png"
    },
    "colors": {
      "frame": "#940000",
      "tab_background_text": "#c90000"
    }
  },
  "version": "2.0",
  "name": "Heartless Riku",
  "manifest_version": 2,
  "description": "Riku from Kingdom Hearts. Heartless emblem with the word \"Heartless\". Theme done completely in black and red with shades of gray as well."
}