Examine source code of save your eyes

{
  "manifest_version": 2,
  "version": "2.0",
  "name": "save your eyes ",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-026-829b05416f823e170310e7c826ad1bec.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(64, 70, 73)",
      "toolbar_field": "rgb(123, 119, 124)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(112, 213, 248)",
      "popup": "rgb(112, 112, 112)",
      "popup_text": "rgb(255, 255, 255)",
      "tab_loading": "rgb(112, 213, 248)",
      "bookmark_text": "rgb(222, 219, 220)",
      "frame": "rgb(74, 3, 103)",
      "tab_background_text": "rgb(139, 139, 139)"
    }
  }
}