I wanted to update one of my free Google Add-on apps that works with colour. What I had is just the standard HTML color input element where the user selects from the palette and that hexadecimal colour code … had always wanted to create a tool for a sidebar or dialogue box that would allow the user to easily access the standard colours or use the custom palette provided by the HTML color input”

Continue reading this post to find out how you can implement your own copy of the colour picker

Source: Google Apps Script: Google Standard Color Palette Picker for Sidebar and Dialog Boxes in Google Sheets, Google Docs and Google Slides – Yagisanatode