// 1. Unity Hub > "New project"
// 2. Template: "3D" or "3D (URP)"
// 3. Name it: "3DPlatformer" > Create

// Choose your sky gradient colours:
RenderSettings.skyboxMaterial.SetColor(
  "_SkyTint",  // top ? #050c18
);
RenderSettings.skyboxMaterial.SetColor(
  "_GroundColor", // bottom ? #0d1a30
);