Examine source code of grass99

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "grass",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-010-e9f94a3e61666a4c7677eb9cce17d854.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(90, 192, 135, 0.48)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(17, 55, 52)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgb(225, 241, 225)",
      "toolbar_field_text": "rgb(0, 0, 0)",
      "tab_line": "rgb(164, 138, 93)",
      "popup": "rgb(255, 255, 255)",
      "popup_text": "rgb(90, 93, 154)",
      "tab_loading": "rgb(164, 138, 93)"
    }
  }
}