Examine source code of Graphite Embergrain

{
  "manifest_version": 2,
  "name": "Graphite Embergrain",
  "version": "1.0",
  "description": "A graphite and ember theme with warm grain texture and angular layered forms.",
  "theme": {
    "images": {
      "theme_frame": "graphite_embergrain.png"
    },
    "colors": {
      "frame": [
        32,
        30,
        28
      ],
      "tab_background_text": [
        245,
        238,
        232
      ],
      "toolbar": [
        58,
        48,
        42
      ],
      "toolbar_text": [
        245,
        238,
        232
      ],
      "tab_line": [
        220,
        120,
        70
      ],
      "bookmark_text": [
        235,
        228,
        222
      ],
      "toolbar_field": [
        75,
        62,
        54
      ],
      "toolbar_field_text": [
        245,
        238,
        232
      ]
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{848f649a-d20a-44f3-9839-f100965bfc5f}"
    }
  }
}