Examine source code of Ramune Colors

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Ramune Colors",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right center"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(252, 201, 185)",
      "toolbar_text": "rgb(132, 32, 32)",
      "frame": "rgb(144, 202, 188)",
      "tab_background_text": "rgb(0, 0, 0)",
      "toolbar_field": "rgb(255, 183, 163)",
      "toolbar_field_text": "rgb(75, 15, 15)",
      "tab_line": "rgb(245, 43, 48)",
      "popup": "rgb(252, 201, 185)",
      "popup_text": "rgb(132, 32, 32)",
      "tab_loading": "rgb(245, 43, 48)"
    }
  }
}