Think of it as your digital magnifying glass. If you need to have a closer look at something, take a screenshot and zoom in.
The simplest way to grab that color: take a screenshot, zoom in, move your mouse over the pixel and press the TAB key.
Shotr doubles as a screen ruler. Use arrow keys to get distance between objects. Need more control and precision? Select an area and check selection size.
Unclutter the desktop. Have a place to store your archive of screenshots, so they don’t get in your way all the time.