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This kind of colour was specified by the client.

The manufacturer know nothing about the change of the colour.

Has the client approved the new colour?

This colour is requested by the customer. The manufacturer is not informed about the change of colour. Has the customer approved the new colour?

This color has indicated by the client. The manufacturer is not clear about the reasons for this change of color.
Has the changed color been confirmed by the client?

The color is appointed by clients. manufacturer doesn't kown the reason of the change of the color. Is the new color is accepted by the clients?