Minecraft wiki entry for Heads-up_display, associated text: All effects the player currently has are shown on the top-right of the screen. Effects that run out sooner appear farther to the left, and effects that are about to run out start to flash. Additionally, positive effects are shown on the top, and other effects (neutral or negative) are shown on the bottom. Beacon effects have a blue (instead of gray) outline, and effects with particles hidden are not indicated in the HUD.