Examine source code of Velvet Horizon Theme

{
  "manifest_version": 2,
  "version": "1.0.0",
  "name": "Velvet Horizon Theme",
  "description": "A unique Firefox theme with velvet pink and indigo horizons. Includes light and dark variations with original 5120×200 headers.",
  "theme": {
    "images": {
      "theme_frame": "header_light.png"
    },
    "colors": {
      "frame": "#FFE4F0",
      "tab_background_text": "#111111",
      "toolbar": "#FFFFFF",
      "toolbar_text": "#111111",
      "icons": "#111111",
      "icons_attention": "#DB2777",
      "button_background_active": "#FBCFE8",
      "button_background_hover": "#FCE7F3"
    },
    "properties": {
      "color_scheme": "light"
    }
  },
  "dark_theme": {
    "images": {
      "theme_frame": "header_dark.png"
    },
    "colors": {
      "frame": "#120E1C",
      "tab_background_text": "#FFFFFF",
      "toolbar": "#0A0C16",
      "toolbar_text": "#FFFFFF",
      "icons": "#FFFFFF",
      "icons_attention": "#C084FC",
      "button_background_active": "#312E81",
      "button_background_hover": "#1E1B4B"
    },
    "properties": {
      "color_scheme": "dark"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{32a2a323-7dcd-49eb-8781-22f97db11a71}"
    }
  }
}