I cannot stress this enough for you, COLOR MEANS NOTHING! EVER! PERIOD! EXCLAMATION POINTS! !! <--------TWO OF EM! RIGHT THERE!
Haha anyway, naw man don't ever believe the color of a pill is an indicator for anything. Pressers can put whatever chemical they want into a pill and dye it whatever color they choose. The only way you can get a good idea of what's in a pill is to test it.
Testing is the only way you can know for sure instead of what somebody who knew a friend's friend told them about what's in it. The vast majority of street rumors on E are bullshit.