Question about Xiaomi 13T Pro

Somehow it seems to be common practice to charge a hefty surcharge for other colours. Whether here or elsewhere, the price structure is always the same. The cheapest offer is and remains black for €469. Then comes blue at 569€ and finally green at 669€. A difference like night and day. The most glaring surcharge compared to the black model is the green model at exactly €200 more. All smartphones are absolutely identical. Same manufacturer and same model. You don't need to give me the standard answer. The prices depend on the supplier. Because as I mentioned above, this price structure can also be found in other e-shops. I think that's downright cheeky. Because this doesn't just apply to mobile phones, but also to graphics card prices. I see the same thing there. White is the most expensive and standard black is €100 cheaper. It seems that the manufacturers adjust their MSRP in the same way.