schema.json

{
    "definitions": {},
    "$schema": "http://json-schema.org/draft-07/schema#",
    "$id": "Hacktoberfest",
    "title": "Root",
    "type": "object",
    "required": [
        "github-username",
        "favourite-game",
        "favourite-language",
        "favourite-color"
    ],
    "properties": {
        "github-username": {
            "$id": "#root/github-username",
            "title": "GitHub-username",
            "type": "string",
            "default": "",
            "examples": [
                "dat-adi"
            ],
            "pattern": "^\\S*$"
        },
        "favourite-game": {
            "$id": "#root/favourite-game",
            "title": "Favourite-game",
            "type": "string",
            "default": "",
            "examples": [
                "DOOM"
            ],
            "pattern": "."
        },
        "favourite-language": {
            "$id": "#root/favourite-language",
            "title": "Favourite-language",
            "type": "string",
            "default": "",
            "examples": [
                "Python"
            ],
            "pattern": "."
        },
        "favourite-color": {
            "$id": "#root/favourite-color",
            "title": "Favourite-color",
            "type": "string",
            "default": "",
            "examples": [
                "#212121"
            ],
            "pattern": "^#([A-Fa-f0-9]{6}|[A-Fa-f0-9]{3})$"
        }
    }
}