Even the "minimal" config should use gamma, to set a good example.

examples/config-minimal.json

 {
     "listen": [null, 7890],
     "verbose": true,
+
+    "color": {
+        "gamma": 2.5,
+        "whitepoint": [1.0, 1.0, 1.0]
+    },
+
     "devices": [
         {
             "type": "fadecandy",