something borrowed something...purple??

I have bad news. In fact, I would as far as to say that I have tragic news.

Can you see what is wrong with this picture??

See that big colored line with their names on it?? When they were first printed off, those were dark blue. A very, very dark blue. However, it appears that air now has the ability to change print color. Those blue  lines are now quite purple. Dark, dark, purple.

Right now, at this exact moment in time, 650 dark blue invitations are being printed off. However, I fear that in a few hours we may have 650 dark purple invitations.

...Help???