src/main/resources/assets/mekanismtools/recipes/lapislazulileggings.json

{
  "result": {
    "item": "mekanismtools:lapislazulileggings"
  },
  "pattern": [
    "***",
    "* *",
    "* *"
  ],
  "type": "minecraft:crafting_shaped",
  "key": {
    "*": {
      "item": "minecraft:dye",
      "data": 4
    }
  }
}