I think that the blue on the engine makes it look like the maintenance people needed a new cowling in a hurry and just grabbed the first one that came to hand, regardless of colour.
As to A340600's 'misuse' of the English language - that type of shorthand is useful in a chat room situation when you are carrying on a conversation 'live' and are trying to reply as quickly as possible. However, I find it inappropriate and distracting in the forum environment. Particularly, I might add, when used in the topic heading. In this case perhaps it served its purpose - I had to start reading the thread to find out what the subject was.