A free mod for Kingdom Come: Deliverance, by JovianStone.
This is a mod that changes a few UI textures for the game. The main things that are changed are the background of the inventory screen and the text on the top of the screen. The background of the inventory screen is changed to be darker. This makes it easier to see what you are purchasing and what you have in your inventory.
This mod will conflict with any other mod that also changes the UI textures. If you have more than one mod that changes the UI textures, you will have to choose which one you want to use.