system-colors
There are 3 repositories under system-colors topic.
patbec/zsh-console-icons
A few abstract ZSH console symbols as SVG and PNG.
param0510/ColorsApp_iOS
iOS App built on Swift. Uses a range of UIKit elements like UITableView, UINavigation - push and popup effects displaying the wide range of apple's system colors.
perseusrealdeal/PerseusUISystemKit
Library based on PerseusDarkMode with modern features like system and semantic colours for early iOS 9.3+, macOS 10.10+; Xcode 10.1+.