What App do you use to select a color anywhere on screen and keep those value to paste the info?
I just use the one built into MacOS usually.
Digital Colour Meter
I use ColorSlurp (from the App Store).
ColorSlurp, Paletter from the App Store and in google chrome I use an extension called ColorPick Eyedropper (https://chrome.google.com/webstore/detail/color-picker/ohcpnigalekghcmgcdcenkpelffpdolg)
I just dowloaded the free version of Paletter (never heard of it before). It’s very useful.