The Big Dictionary of Dreams
by Martha Clarke
To see yourself as much paler than usual in a dream could be a warning of an illness that has not yet been discovered.
If this is not the case, paleness could indicate the disappearance and sapping of spiritual or mental strength. To see others go pale could reflect a fear of losing them, of them disappearing, or that they change their opinion of you.
The Complete Guide to Interpreting Your Dreams
by Stearn Robinson - Tom Corbett
To be aware, in your dream, of your own pallor predicts an unexpected gain.
To notice anyone else looking pale forecasts an illness or a shock for that person.
If the pale person was unknown to you, the dream is warning you to look for a hidden danger to your business or your investments, whichever applies.