MineAssets/1.12.2/assets/minecraft/recipes/light_gray_concrete_powder.json

{
  "type": "crafting_shapeless",
  "group": "concrete_powder",
  "ingredients": [
    {
      "item": "minecraft:dye",
      "data": 7
    },
    {
      "item": "minecraft:sand",
      "data": 0
    },
    {
      "item": "minecraft:sand",
      "data": 0
    },
    {
      "item": "minecraft:sand",
      "data": 0
    },
    {
      "item": "minecraft:sand",
      "data": 0
    },
    {
      "item": "minecraft:gravel"
    },
    {
      "item": "minecraft:gravel"
    },
    {
      "item": "minecraft:gravel"
    },
    {
      "item": "minecraft:gravel"
    }
  ],
  "result": {
    "item": "minecraft:concrete_powder",
    "data": 8,
    "count": 8
  }
}