Tache 4 (Testé + rectification).

app/src/main/java/model/DistinctColorGenerator.java

@@ -19,7 +19,7 @@ public class DistinctColorGenerator implements ColorGenerator {
         for (Color color : this.colors) {
             boolean cellNotUsed = true;
             for (Cell newCell : neighbours) {
-                if (color==cell.getColor())
+                if (color==newCell.getColor())
                 { cellNotUsed = false; }
             }
             if (cellNotUsed == true) {

app/src/main/java/model/UniformExceptOneGenerator.java

@@ -18,7 +18,7 @@ public class UniformExceptOneGenerator implements ColorGenerator{
     public Color nextColor(Cell cell) {
         counter++;
         if(counter==2){
-            return this.uniColor;
+            return this.excepColor;
         }
-        return this.excepColor;    }
+        return this.uniColor;    }
 }