git clone https://github.com/fikrado-orgnasation/sweat-kali
cd sweet-kali
sudo bash install.sh

I have a github repo that conting sweet theme for kali linux it easy quit simple and easy implementation

First clone the github repo git clone https://github.com/fikrado-orgnasation/sweat-kali

Second cd to the directory and run the install.sh file with sudo sudo ./install.sh

Finally go to apperance and then chose sweet from the themes and candy icons from icon theme.