I would like to share my spreadsheet add-on here. Its name is Team Color. After installed the add-on, everytime you type a hex color code, the background of cell will be changed to that color automatically. This is very useful for sharing color palette with teammates in developing apps, websites and anything else colorful.
Moreover, it has also provide custom formula for color manipulation. You could even make a colorful spreadsheet with gradient color like the screenshot.
Team Color - Google Sheets add-onhttps://chrome.google.com/webstore/detail/team-color/ldggbboahhbelionpagpifdnkicagagg?authuser=1