feat(CustomBiome): Support blank colors

Author: Jsinco

main/src/main/java/me/outspending/biomesapi/registry/handlers/SpecialEffectsHandler.java

@@ -20,13 +20,21 @@ public void handle(BiomeSpecialEffects value, @NotNull Biome.BiomeBuilder builde
     @Override
     public BiomeSpecialEffects build(@NotNull CustomBiome biome) {
         // TODO: Expand this to include more special effects settings
-        BiomeSpecialEffects.Builder builder = new BiomeSpecialEffects.Builder()
-                .foliageColorOverride(biome.getFoliageColor())
-                .waterColor(biome.getWaterColor())
-                .grassColorOverride(biome.getGrassColor())
-                .grassColorModifier(biome.getGrassColorModifier().getDelegateModifier())
-                .dryFoliageColorOverride(biome.getFoliageColor())
-                ;
+        BiomeSpecialEffects.Builder builder = new BiomeSpecialEffects.Builder();
+        if (biome.getFoliageColor() != 0) {
+            builder.foliageColorOverride(biome.getFoliageColor());
+            builder.dryFoliageColorOverride(biome.getFoliageColor());
+        }
+
+        if (biome.getWaterColor() != 0) {
+            builder.waterColor(biome.getWaterColor());
+        }
+
+        if (biome.getGrassColor() != 0) {
+            builder.grassColorOverride(biome.getGrassColor());
+        }
+
+        builder.grassColorModifier(biome.getGrassColorModifier().getDelegateModifier());
 
         return builder.build();
     }