Examine source code of yellow-blue

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "theme4",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-018-0ca3dfc7bb661ec53999d358812ce0ab.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(2, 50, 86)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(23, 86, 131)",
      "tab_background_text": "rgb(194, 155, 194)",
      "toolbar_field": "rgb(14, 40, 59)",
      "toolbar_field_text": "rgb(156, 212, 255)",
      "tab_line": "rgb(255, 255, 2)",
      "popup": "rgb(19, 34, 44)",
      "popup_text": "rgb(255, 255, 0)",
      "tab_loading": "rgb(255, 255, 2)"
    }
  }
}