Examine source code of Rickard, Dark Mode

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Rickard, Dark Mode",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-001-9c6d74e14860e77ee6f8f43e824bff25.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(75, 75, 76)",
      "toolbar_text": "rgb(222, 222, 222)",
      "frame": "rgb(48, 48, 48)",
      "tab_background_text": "rgb(235, 235, 235)",
      "toolbar_field": "rgb(48, 40, 40)",
      "toolbar_field_text": "rgb(232, 232, 242)",
      "tab_line": "rgb(29, 29, 29)",
      "popup": "rgb(75, 75, 76)",
      "popup_text": "rgb(212, 212, 212)",
      "frame_inactive": "rgb(36, 36, 36)",
      "icons_attention": "rgb(59, 203, 106)",
      "popup_highlight_text": "rgb(96, 61, 10)",
      "popup_highlight": "rgb(247, 216, 205)",
      "sidebar_border": "rgb(41, 39, 41)",
      "sidebar_highlight_text": "rgb(218, 218, 218)",
      "sidebar_highlight": "rgb(104, 104, 104)",
      "sidebar_text": "rgb(202, 187, 166)",
      "sidebar": "rgb(50, 50, 50)",
      "tab_background_separator": "rgb(32, 222, 78)",
      "tab_loading": "rgba(142, 149, 18, 0.74)",
      "toolbar_field_border_focus": "rgb(61, 47, 47)",
      "toolbar_field_border": "rgb(59, 59, 59)",
      "toolbar_field_focus": "rgb(43, 43, 43)",
      "toolbar_field_highlight_text": "rgb(51, 47, 24)",
      "toolbar_field_highlight": "rgb(169, 167, 169)",
      "toolbar_field_separator": "rgb(238, 255, 40)",
      "toolbar_field_text_focus": "rgb(222, 207, 179)",
      "toolbar_vertical_separator": "rgb(42, 226, 57)"
    }
  }
}