The best alternatives to Swiss Color are Coolors, Color Hunt, and Material UI Colors. If these 3 options don't work for you, we've listed a few more alternatives below.
Color Copy Paste is plugin that allows you to copy & paste colour directly from your phone's camera to your web browser, figma or sketch plugin. You can manage the colours with no hassle. No more manually taking picture and use color picker to get the color.
Tint is a color tool designed to ease your work and boost productivity. - Pick and adjust colors - Copy color in any format (even defined by you) - Organize colors in pallets - Complete history of picked colors - Backup data on iCloud and sync between devices