Adjusted tile pallets, added gravel.

ClientApp/assets/data/tiles.json

@@ -73,14 +73,14 @@
     "mnemonic-id" : "green-moss",
     "display-name" : "Green Moss",
     "solid": true,
-    "color": "#FFFFFF",
-    "pallet": []
+    "color": "#006633",
+    "pallet": ["#007733", "#006644", "#116633"]
   },
   {
     "mnemonic-id" : "lava-moss",
     "display-name" : "Lava Moss",
     "solid": true,
-    "color": "#FFFFFF"
+    "color": "#DD6655"
   },
   {
     "mnemonic-id" : "granite",
@@ -122,11 +122,19 @@
   {
     "mnemonic-id" : "sand",
     "display-name" : "Sand",
-    "solid": false,
+    "solid": true,
     "forced-ticc-func": "sand-grav",
     "color": [238, 232, 170],
     "pallet": [[238, 232, 170], [232, 238, 160], [218, 212, 175]]
   },
+  {
+    "mnemonic-id" : "gravel",
+    "display-name" : "Gravel",
+    "forced-ticc-func": "sand-grav",
+    "solid": true,
+    "color": [102, 118, 124],
+    "pallet": [[92, 102, 128], [89, 116, 123], [121, 95, 108]]
+  },
   {
     "mnemonic-id" : "white-sand",
     "display-name" : "White Sand",
@@ -176,13 +184,7 @@
     "mnemonic-id" : "clay",
     "display-name" : "Clay",
     "solid": false,
-    "color": "#FFFFFF"
-  },
-  {
-    "mnemonic-id" : "silt",
-    "display-name" : "Silt",
-    "solid": false,
-    "color": "#FFFFFF"
+    "color": "#660000"
   },
   {
     "mnemonic-id" : "snow",
@@ -203,15 +205,13 @@
     "color": "#FFFFFF",
     "pallet": []
   },
-
   {
     "mnemonic-id" : "stone-brick",
     "display-name" : "Gray Brick",
     "solid": false,
-    "color": "#FFFFFF",
+    "color": "#A0A0A0",
     "pallet": []
   },
-
   {
     "mnemonic-id" : "copper-ore",
     "display-name" : "Copper Ore",