if i see a yellow canary, it's a canary, if i see an orange canary, i don't start suddenly start calling the canary (even though it's a different colour) something else! (electronic engineers seem to do, 1 name is never enough)
Then how would anyone else who never saw the canary know what colour it was XD
The opposite is true with men/women and colours. To me green is green, red is red & blue is blue in almost all there shades but to the wife there are several different names :~