You can solve minor discoloration and orange tones without bleach stripping your hair twice in one day and burning your scalp.
Using shampoo for colored hair (purple shampoo for blondes, blue shampoo for dark hair) will help keep an even tone.
Using a toner can be gentler. It will not change your color too much, but you can use it more frequently than bleach. If you have the patience for gradually altering your color.