Examine source code of E621: Hexagon

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "e6: Hexagon",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png",
        "images/1.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top",
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "repeat",
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(21, 47, 86)",
      "toolbar_text": "rgb(180, 199, 216)",
      "frame": "rgb(2, 15, 35)",
      "tab_background_text": "rgb(180, 199, 216)",
      "toolbar_field": "rgb(2, 15, 35)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(252, 179, 40)",
      "popup": "rgb(2, 15, 35)",
      "popup_text": "rgb(177, 198, 225)",
      "popup_border": "rgb(0, 0, 0)",
      "tab_background_separator": "rgb(2, 15, 35)",
      "tab_text": "rgb(255, 255, 255)",
      "tab_loading": "rgb(252, 179, 40)"
    }
  }
}