Here are the few steps to archive this : 1. Open Minecraft's data directory. If you don't know how to do this, this screenshot will help you. [![][1]][1] 2. Go to versions/The version you use 3. Open it with WinRar (or any JAR viewer) 4. Navigate to `assets/minecraft/textures/gui` 5. Open `icons.png` with an image editor. At this point you should see this: [![][2]][2] 6. Paint them with red brush. 7. That's all! Save it and restart MC. [1]: https://i.sstatic.net/ed19O.png [2]: https://i.sstatic.net/08FaW.png