Color-matching mouse and trackpad options for iMac 24

I'm about to buy the new imac 24 with M4, but I'm holding my purchase because I don't understand why I am limited to choose between mouse or trackpad. As the purchase option indicates that the mouse and trackpad will come in the same colour with the imac, it tempted me to purchase both.

And if I buy additional mouse or trackpad, it won't come with the same colour as iMac.

That's the only thing stopping me from purchasing right now.

[Re-Titled by Moderator]