Examine source code of Kit's Dreamland

{
  "manifest_version": 2,
  "version": "1.4",
  "description": "Unofficial Firefox Kit mascot theme inspired by pastel colors, optimized for vertical tabs",
  "name": "Kit's Dreamland",
  "browser_specific_settings": {
    "gecko": {
      "id": "kit-dreamland@miman"
    }
  },
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/icon-light.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "left top"
      ]
    },
    "colors": {
      "frame": "#ffffff",
      "toolbar": "hsla(255, 100%, 98%, 0.95)",
      "button_background_active": "hsla(336, 100%, 84%, 0.2)",
      "button_background_hover": "hsla(336, 100%, 84%, 0.1)",
      "icons": "#7aa3d9",
      "icons_attention": "#ffafcc",
      "toolbar_text": "#3a304a",
      "toolbar_vertical_separator": "hsla(210, 96%, 87%, 0.3)",
      "toolbar_field": "#ffffff",
      "toolbar_field_focus": "#ffffff",
      "toolbar_field_text": "#3a304a",
      "toolbar_field_text_focus": "#3a304a",
      "toolbar_field_border": "hsla(281, 38%, 79%, 0.4)",
      "toolbar_field_border_focus": "#ffafcc",
      "toolbar_field_highlight": "hsla(209, 100%, 82%, 0.25)",
      "toolbar_top_separator": "hsla(336, 100%, 84%, 0.4)",
      "toolbar_bottom_separator": "hsla(210, 96%, 87%, 0.3)",
      "bookmark_text": "#3a304a",
      "tab_text": "#3a304a",
      "tab_background_text": "#5a4f6e",
      "tab_background_separator": "hsla(281, 38%, 79%, 0.2)",
      "tab_line": "#a2d2ff",
      "tab_loading": "#a2d2ff",
      "ntp_background": "#fcfaff",
      "ntp_text": "#3a304a",
      "popup": "#ffffff",
      "popup_text": "#3a304a",
      "popup_border": "hsla(281, 38%, 79%, 0.3)",
      "popup_highlight": "hsla(210, 96%, 87%, 0.40)",
      "sidebar": "#f9f7fc",
      "sidebar_text": "#3a304a",
      "sidebar_border": "hsla(210, 96%, 87%, 0.4)",
      "sidebar_highlight": "#bde0fe",
      "sidebar_highlight_text": "#3a304a"
    }
  },
  "dark_theme": {
    "images": {
      "additional_backgrounds": [
        "images/icon-dark.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top"
      ]
    },
    "colors": {
      "frame": "#1d1926",
      "toolbar": "hsla(260, 25%, 14%, 0.95)",
      "button_background_active": "hsla(210, 100%, 82%, 0.2)",
      "button_background_hover": "hsla(210, 100%, 82%, 0.1)",
      "icons": "#bde0fe",
      "icons_attention": "#ffafcc",
      "toolbar_text": "#e8e1f2",
      "toolbar_vertical_separator": "hsla(336, 100%, 84%, 0.15)",
      "toolbar_field": "#272235",
      "toolbar_field_focus": "#2e283f",
      "toolbar_field_text": "#e8e1f2",
      "toolbar_field_text_focus": "#ffffff",
      "toolbar_field_border": "hsla(209, 100%, 82%, 0.4)",
      "toolbar_field_border_focus": "#a2d2ff",
      "toolbar_field_highlight": "hsla(336, 100%, 84%, 0.2)",
      "toolbar_top_separator": "hsla(210, 96%, 87%, 0.2)",
      "toolbar_bottom_separator": "hsla(336, 100%, 84%, 0.15)",
      "bookmark_text": "#e8e1f2",
      "tab_text": "#e8e1f2",
      "tab_background_text": "#9d90b0",
      "tab_background_separator": "hsla(336, 100%, 84%, 0.1)",
      "tab_line": "#ffafcc",
      "tab_loading": "#ffafcc",
      "ntp_background": "#1d1926",
      "ntp_text": "#e8e1f2",
      "popup": "#272235",
      "popup_text": "#e8e1f2",
      "popup_border": "hsla(209, 100%, 82%, 0.3)",
      "popup_highlight": "hsla(336, 100%, 84%, 0.15)",
      "sidebar": "#241f30",
      "sidebar_text": "#e8e1f2",
      "sidebar_border": "hsla(209, 100%, 82%, 0.25)",
      "sidebar_highlight": "#a2d2ff",
      "sidebar_highlight_text": "#1d1926"
    }
  }
}