Examine source code of jleaf_colors

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "jleaf_colors",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "repeat-x"
      ]
    },
    "colors": {
      "toolbar": "rgba(0, 0, 0, 0)",
      "toolbar_text": "rgb(174, 125, 218)",
      "frame": "rgb(22, 54, 75)",
      "tab_background_text": "rgb(97, 220, 255)",
      "toolbar_field": "rgba(22, 33, 44, 0)",
      "toolbar_field_text": "rgb(243, 16, 174)",
      "tab_line": "rgb(154, 221, 232)",
      "popup": "rgb(22, 33, 44)",
      "popup_text": "rgb(243, 16, 174)",
      "button_background_active": "rgba(34, 25, 77, 0.01)",
      "frame_inactive": "rgb(238, 176, 211)",
      "icons_attention": "rgb(243, 16, 174)",
      "icons": "rgb(136, 42, 233)",
      "tab_loading": "rgb(154, 221, 232)",
      "toolbar_field_focus": "rgb(22, 33, 44)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{18f75ee4-f2d5-48c6-9609-69376bd47ff7}"
    }
  }
}