Ultramarine Violet is a nice PvP resource pack with many of the items and the interface colored in different shades of purple. It has everything you need for comfortable fights, including short swords, a minimum of animations, and translucent inventory.
How to install Ultramarine Violet resource pack
Make sure you have Optifine installed and working correctly.
Download the resource pack and leave it archived.
Launch Minecraft, go to Settings.
In the ‘Resource Packs’ section, select ‘Open resource pack folder ’.
The ‘resourcepacks’ folder will open, copy the archive there.
After copying, the resourcepack will appear in the section of available packages. Click on it to move to the Selected Resource Packs section.
Start a new game or load an old one. Textures will appear in all saves.