theme.json example ; for version 2.

theme.json

{
  "$schema": "https://schemas.wp.org/trunk/theme.json",
  "version": 2,
  "settings": {
    "color": {
      "custom": false,
      "customGradient": false,
      "gradients": [],
      "link": false,
      "defaultPalette": false,
      "defaultGradients": false,
      "palette": [
        {
          "name": "primary blue",
          "slug": "primary-blue",
          "color": "#0057B7"
        },
        {
          "name": "primary gold",
          "slug": "primary-gold",
          "color": "#E9E186"
        },
        {
          "name": "white",
          "slug": "white",
          "color": "#FFFFFF"
        },
        {
          "name": "black",
          "slug": "black",
          "color": "#000000"
        }
      ]
    },
    "spacing": {
      "padding": true,
      "units": ["px", "em", "rem", "vh", "vw"]
    },
    "typography": {
      "fontWeight": false
    }
  }
}