Examine source code of Material Blue V2 - RMRL

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Material Blue V2 - RMRL",
  "theme": {
    "images": {},
    "properties": {},
    "colors": {
      "toolbar": "rgb(31, 34, 61)",
      "toolbar_text": "rgb(228, 242, 249)",
      "frame": "rgb(8, 11, 33)",
      "tab_background_text": "rgb(228, 242, 249)",
      "toolbar_field": "rgb(8, 11, 33)",
      "toolbar_field_text": "rgb(228, 242, 249)",
      "tab_line": "rgb(31, 34, 61)",
      "popup": "rgb(31, 34, 61)",
      "popup_text": "rgb(228, 242, 249)",
      "ntp_background": "rgb(31, 34, 61)",
      "popup_border": "rgb(31, 34, 61)",
      "tab_loading": "rgb(31, 34, 61)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{c0d825a0-88d3-46a4-993d-8bf21696b14e}"
    }
  }
}