Both of those are actually built-in but very poorly documented (or basically undocumented). Disable keyboard for cleaning : https://apple.stackexchange.com/a/448938 and for the color picker MacOS has "Digital Color Meter.app" preinstalled when its window has the focus hover anywhere on screen and use cmd+shift+c to copy the value (by default it uses RGB but in the View menu you can change it to hexadecimal, the values are then copied as HTML #)