Examine source code of Slate

{
  "name": "Slate",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "jotun-ral-5012-light-blue-polyester-80-gloss-powder-coating-20kg-box-2255-p.jpg"
    },
    "colors": {
      "frame": "rgba(32, 67, 107, 1)",
      "tab_background_text": "rgba(0, 0, 0, 1)",
      "toolbar": "rgba(23, 66, 107, 0.85)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(255, 255, 255, 0.77)",
      "toolbar_field_text": "rgba(0, 0, 0, 1)",
      "tab_line": "rgba(173, 173, 173, 0.78)"
    }
  }
}