Based on the color palette of Tokyonight for Neovim by @Folke
Copy the file for the flavor you want into ~/.termux/colors.properties
then restart the Termux app or run termux-reload-settings
.
$ git clone https://github.com/ravener/tokyonight-termux
$ cd tokyonight-termux
$ mkdir -p ~/.termux
$ cp tokyonight_night.properties ~/.termux/colors.properties
$ termux-reload-settings