Assuming that you mean no discernible difference in color or shade, its not that easy. It will require more than just the same dye temperature and time.
Best matching will occur when all of the parts are made of the same alloy, and have the same surface prep. Producing an anodize layer of consistant thickness and pore density among all of the parts will also be required. A consistant layer will require tight control of the current density for each part; which mandates accurate current control (a CC/CV power supply) excellent electrical connections, consistant anodizing temperature, and consistant electrolyte agitation.
Very dark colors are the easier to match (except green and red) with black being the easiest by far.
On a more basic level; using a tank and electrolyte volume that is substantially more than is needed for the part makes temperature control easier, using a cathode distance substantially larger than prescribed 3 inch minimum also helps.
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