{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "type": "number",
  "oneOf": [
    {
      "type": "number",
      "description": "normal",
      "enum": [0]
    },
    {
      "type": "number",
      "description": "multiply",
      "enum": [1]
    },
    {
      "type": "number",
      "description": "screen",
      "enum": [ 2]
    },
    {
      "type": "number",
      "description": "overlay",
      "enum": [ 3]
    },
    {
      "type": "number",
      "description": "darken",
      "enum": [ 4]
    },
    {
      "type": "number",
      "description": "lighten",
      "enum": [ 5]
    },
    {
      "type": "number",
      "description": "colorDodge",
      "enum": [ 6]
    },
    {
      "type": "number",
      "description": "colorBurn",
      "enum": [ 7]
    },
    {
      "type": "number",
      "description": "hardLight",
      "enum": [ 8]
    },
    {
      "type": "number",
      "description": "softLight",
      "enum": [ 9]
    },
    {
      "type": "number",
      "description": "difference",
      "enum": [ 10]
    },
    {
      "type": "number",
      "description": "exclusion",
      "enum": [ 11]
    },
    {
      "type": "number",
      "description": "hue",
      "enum": [ 12]
    },
    {
      "type": "number",
      "description": "saturation",
      "enum": [ 13]
    },
    {
      "type": "number",
      "description": "color",
      "enum": [ 14]
    },
    {
      "type": "number",
      "description": "luminosity",
      "enum": [ 15]
    }
  ],
  "default": 0
}