Vibrant is an Ogri'la crystal attunement helper. I wrote it the day after my char could do quests in Ogri'la, because I didn't like to write down the color sequences. If you cannot memorize these sequences and therefore have to write them down, then Vibrant might be a big help to you.
This addon displays four colored crystals near the middle of your screen. Clicking a color will record it as part of the sequence. Pressing the play button replays you recorded sequence, the X button deletes it.
Vibrant is best configured via FuBar - but if you don't use that, /vibrant will also do.