Minecraft wiki entry for Effect, associated text: In Java Edition, positive effects have blue text in potion information and are displayed on the upper row of effects in the heads up display, while negative effects have red potion text and are displayed in the bottom row. Neutral effects have the blue potion text and are listed with the negative effects in the bottom row in the heads up display. In Bedrock Edition, negative effect names in potion and tipped arrow tooltips are shown in red; positive and neutral effect names in these contexts, and all effect names in the "Mob effects" screen, are shown in white.