Examine source code of Blue and black

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "blue",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-006-51ab495c5f5dde6a3cddb22484acd00d.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(42, 103, 127, 0.96)",
      "toolbar_text": "rgb(0, 0, 0)",
      "frame": "rgb(0, 0, 0)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgba(255, 255, 255, 0.53)",
      "toolbar_field_text": "rgb(0, 0, 0)",
      "tab_line": "rgb(112, 106, 110)",
      "popup": "rgb(0, 0, 0)",
      "popup_text": "rgb(255, 255, 255)",
      "button_background_hover": "rgb(42, 103, 127)",
      "frame_inactive": "rgb(0, 0, 0)",
      "icons_attention": "rgb(0, 0, 0)",
      "icons": "rgb(0, 0, 0)",
      "ntp_background": "rgb(42, 103, 127)",
      "popup_border": "rgb(26, 26, 26)",
      "sidebar_border": "rgb(0, 0, 0)",
      "sidebar_text": "rgb(0, 0, 0)",
      "tab_loading": "rgb(42, 103, 127)",
      "tab_text": "rgb(0, 0, 0)",
      "toolbar_field_border_focus": "rgb(0, 0, 0)",
      "toolbar_field_focus": "rgb(0, 0, 0)",
      "toolbar_field_highlight": "rgb(0, 0, 0)",
      "toolbar_field_text_focus": "rgb(255, 255, 255)",
      "toolbar_vertical_separator": "rgb(4, 4, 4)"
    }
  }
}