Examine source code of Mardi GrawDient

{
  "theme": {
    "images": {
      "theme_frame": "Mardi_Graw_Dient.png"
    },
    "colors": {
      "frame": "#b517d4",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Mardi GrawDient",
  "manifest_version": 2,
  "description": "This started out to be an Easter Sunday Gradient and I guess it could be because of it's colors.. But when I spotted the mask shape in the Gradient, I couldn't help thinking of Mardi Gras! I guess  you could choose  it for either holiday. (deep pink, light red, purple, violet blue, orange, yellow green, multicolored, rainbows, springtime, celebration, celebrate, partying, festival, Fat Tuesday, Lent, New Orleans, Big Easy)c0l1\n\nThis is an original Holiday design by CollieSmile."
}