If your colour complexion is dark it is because of the pigment cells which are present in the skin . the existing colour cannot be changed but the quality of skin and soften of the skin will make it look more bright and healthy.
For home remedies you should try using aloe Vera everyday and starwberry mask also can help . try using pumpkin mask but always do a patch test before applying on full face.
Always use a sunscreen which is very important for you.
Try doing treawnts like jet facial or Hydra facial which we do at our clinic.
Hope this helps
Dr Batul Patel