1. Change main color

Open Common/Color.js and update these values, since v1.2.0 this could be done by the ListApp Manager setting

  active: '#30E390',
  toolbarTint: "#1CB5B4",

2. Change the app name, app icon and splash screent

Open app.json and replace these values:

"name": "CeNews",
....
"icon": "./assets/icons/app-icon.png",
"loading": {
    "icon": "./assets/icons/loading.png",
},
"splash": {
      "image": "./assets/icons/loading.png",
},

3. Updating...