The Pink Pill is 1 Red Pill and 2 White Pills mixed together. They are commonly found at websites like patriots.win.
Becoming addicted to Pink Pills leads you down a path where you will ultimately need to mainline a Clown Pill or a Purple Pill to survive when they run out of White Pills to keep the ratio correct. This happens because you're not accustomed to consuming Red Pills without a good mix of White Pills to soften them.
Something positive. For example, a white pill would be some piece of news that makes it appear that they are just about to go back and fix the stolen election, etc.
White pills are sometimes true (rarely), but they also act as pacifiers to keep people who have had too many red / black pills from getting too angry.