Hello,
I would like to share a small project with the community. I hope this is the right place to share it.
I love colors and I love my dashboard to show different states of my sensors in different colors, but had struggle with picking the right color for my cards.
There are plenty of websites and tools offering color picks, but still I hope that my project might help someone, like it helped me 
Extended color picker is based on the CSS Color Module Level 3 which I found in homeassistant/util/color.py.
Features
- HSL Color Modifier - pick exact color for your needs
– Copy to clipboard button - for easy pasting in your configuration - Extended color picker - picks a “word” of the color for direct implementation (red, yellowgreen, turquoise, palegreen, etc.)
– when color is clicked, automatically copies the name to the clipboard - Previews for both options
- Light and Dark mode
You can view and use it at Home Assistant Color Picker and HSL Modifier
I hope it will help.