screenkey:tldr:29cb0

The command you provided is using the screenkey program with various options to customize its appearance. Here is an explanation of each option used:

--bg-color "${#a1b2c3}": This option sets the background color of the on-screen keyboard. The color is specified in hexadecimal format, where #a1b2c3 represents a specific color. It can be changed to any valid hexadecimal color code.

--font ${Hack}: This option sets the font used for displaying the keys on the on-screen keyboard. In this case, the font chosen is named "Hack". You can modify it to any font name installed on your system.

--font-color ${yellow}: This option sets the font color used to display the keys. The chosen color here is "yellow". You can change it to any valid color name or hexadecimal code.

--opacity ${0-8}: This option sets the opacity level of the on-screen keyboard. The value provided, ${0-8}, indicates a range from fully transparent (0) to fully opaque (8). Adjusting this value allows you to control the visibility of the keyboard.

Please note that the command you provided includes variable placeholders (${}) around color names and opacity values. To make it work correctly, the variables should be replaced with actual color names and desired opacity levels.