Customizing or Removing the Rainbow XP Bar Pack

Turning It Off Temporarily

If you want the vanilla look back without deleting anything, go to Options → Resource Packs and click the arrow to move the pack from Selected back to Available. Click Done and the green bar returns immediately. You can re-enable it the same way at any time.

Removing It Permanently

Open the resourcepacks folder from the Resource Packs menu, delete the pack's .zip file or folder, then restart Minecraft or press F3 + T. The pack disappears from the list entirely.

Editing the Colors Yourself

Because this is a texture pack, the rainbow effect is just an image. To change it:

1. Copy the pack's .zip and rename the copy so you keep an untouched backup.

2. Extract the copy and navigate to the GUI textures folder inside assets.

3. Find the experience bar texture and open it in an image editor.

4. Repaint the gradient with whatever colors you prefer, keeping the same pixel dimensions and transparency.

5. Save, re-zip the folder so pack.mcmeta and assets are at the root, and place it back in resourcepacks.

Combining With Other Packs

If you only want the recolored ping bars but not the XP bar, you can keep this pack low in the Selected list and place a pack that overrides just the experience bar above it, so the two effects mix.