grabc
A tool to identify a pixel color of an X Window. tldr-pages
On Linux
Linux
Pick a pixel and print its color in hexadecimal
grabcIdentifyPick a pixel and print its RGB values
grabc -rgbIdentifyEnable debug messages
grabc -dIdentifyPrint the hex ID of the clicked window
grabc -WIdentifyPick a pixel at a specific location on a specific window
grabc -w window_id -l +x+yIdentifyPrint all 16 bits of color (default prints high 8 bits)
grabc -aIdentifyDisplay help
grabc -hIdentify