Examine source code of blue color cool

{
  "name": "blue color cool",
  "manifest_version": 2,
  "version": "2.0",
  "theme": {
    "images": {
      "theme_frame": "Scratch Looks Blocks_switch backdrop to .svg"
    },
    "colors": {
      "frame": "rgba(0, 77, 255, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "toolbar": "rgba(230, 207, 207, 1)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(130, 60, 60, 1)",
      "toolbar_field_text": "rgba(255, 255, 255, 1)",
      "tab_line": "rgba(255, 0, 0, 1)"
    }
  }
}