style

• style as a Ttk command, shipping with Tk 8.5.

https://www.tcl-lang.org/man/tcl8.5/TkCmd/ttk_style.htm

• style as a tcllib module

[ This web page does not currently exist: http://tcllib.sourceforge.net/doc/style.html ]

style is a tklib package which provides theming via the tk option command.