Most mammals cannot see colour.
Many insects have multiple visual pigments.
This type of observation is very common and I think also very naive from the standpoint of design. Paul Nelson has written a really great article about the argument from imperfection that I suggest everyone should read. I understand it has now been published, so if Paul is listening maybe he could give us the reference. The reason I say the above is naive is that it assumes one can change one aspect of a design keeping everything else the same. This might be possible with simple designs but almost certainly is not for complicated ones.