Essential UI is a small texturepack, that changes all buttons and the hotbar to fit the style of the Essential mod. With This texturepack, your Minecraft will look much cleaner when using the Essential mod.
If you want some preview images, check out the Gallery!
For this Resource Pack to work, you do not need Optifine!
If you find any bugs or want to suggest something, you can join my Discord and message me there.
If you want to change the hotbar to the vanilla variant, you will have to go to the ressourcepack folder and exchange assets/minecraft/textures/gui/widgets.png for this image.