The bug

In Java Edition 1.17 or so, the textures for armor slot icons were changed to no longer be black, but a comparatively lighter gray. This has not happened in Bedrock Edition, resulting in a feature disparity.

How to reproduce

1. Open your inventory
2. Observe

Expected results

Gray armor slots.

Actual results

Black armor slots.

How to fix

Take the current slot icon textures from Java Edition and replace the ones in Bedrock Edition with these.