The point of this tool is to be a one-to-many color translation tool. I've wanted something like this for years - a way to see one color, but see how it translates into multiple color spaces at once.
A couple things to point out about it:
It translates to color spaces with an alpha channel (rgba, hsla and hex8) and will also translate from those spaces back to non-alpha colors. It assumes a white background for the translations. Ever have an RGBA value but want to know what it's 'flattened' value is? Now you can find out.
The source of truth is the color in the query parameter in the URL - which means you can send URLs to others and they'll get the translations
There is a color picker - this is dependent on how your browser responds to input type="color" - for instance, Chrome supplies it's own color picker, which sadly lacks an eye dropper.
My favorite bit, though, is how I managed to get the favicon to update with the color. I got some help from very smart coworkers on this - I'll do a write up on how I pulled that off at another time.
Tech used
React and Create React App - this was a fairly small app, honestly