To dream of a birthday cake represents a situation in your waking life that makes you feel lucky or special. Something good has happened that is just for you. You may be getting exactly what you wanted. A wish may have been realized.
If you see a birthday cake with blood on it may reflect a negative situation that overshadows your good luck. It may also represent guilt you have with something negative you did to achieve your good fortune.
A pink may reflect good fortune that you are obsessed with. Something good has happened and you want to experience it all the time. It may also reflect sexual favor during a special event. Someone may be flirting with during a special moment.