Apple USB Keyboard Model M2452 - What Color Is It?

Mine looks sort of blue/green...

Then it is Bondi Blue. This is an image of a Bondi Blue original iMac from the MacTracker database:

Bondi Beach in Australia was the inspiration with its blue-green waters.

The MacTracker database usually has the order numbers for Apple products that can uniquely identify variants like color, but it lists no such codes for the M2452.

Blueberry is distinctly a rich blue and Lime is one serious shade of green. Again from the MacTracker database:

Blueberry is at the very bottom and Lime is upper right. The other three were called Grape, Strawberry, and Tangerine.

My Bondi Blue keyboard has the same 1998 copyright, but an 8 as the first digit. The Bondi Blue iMac was discontinued in the beginning of 1999. Your keyboard could be a late production (maybe a spare part). So, no direct help here. On the other hand, yes, the photos appear to show the blue-green Bondi colour.

Also, if the first digit of the serial number, after the initial letter(s), is an 8 (the manufacturing year = 1998), the probability is greater that it is a Bondi Blue keyboard (although one should perhaps not rule out the possibility that some of the keyboards for the multi-coloured models introduced 1999 may have been made already 1998).