equal
Description:
Compares two Colors and checks if they are the same.
This function can be passed to g_hash_table_new as the key_equal_func parameter, when using 
      Colors as keys in a GenericSet
      .
Parameters:
| v1 | 
           a Color  | 
      
| v2 | 
           a Color  | 
      
Returns:
| 
           
  |