XGetWMColormapWindows(3) on Linux
The text 54115bcd2897, as Debian 13 (Trixie) shipped it.
set or read a window's WM_COLORMAP_WINDOWS property
The text 54115bcd2897, as Debian 13 (Trixie) shipped it.
set or read a window's WM_COLORMAP_WINDOWS property