Lower color saturation in material files for better 3D visualization

src/scripts/model_maker.py

@@ -964,10 +964,10 @@ def write_obj(scatterer, geometry, max_rad):
     out_model_path = Path(str(geometry['out_file']) + ".obj")
     out_material_path = Path(str(geometry['out_file']) + ".mtl")
     color_strings = [
-        "1.0 1.0 1.0\n", # white
-        "1.0 0.0 0.0\n", # red
-        "0.0 0.0 1.0\n", # blue
-        "0.0 1.0 0.0\n", # green
+        "0.5 0.5 0.5\n", # white
+        "0.3 0.0 0.0\n", # red
+        "0.0 0.0 0.3\n", # blue
+        "0.0 0.3 0.0\n", # green
     ]
     color_names = [
         "white", "red", "blue", "green"