Transparent Color Slider

More creative controls to get your cards looking just right (also works with boxes, and background tint color too)

Implementation Notes

While building Ways to pass time inside this room, I heavily relied on the secret ability to use transparent as the card color to improve the presentation of cards on this space.

I figured more people would benefit knowing about this feature so I updated the color picker to add a transparent shortcut button

It was cool that more people knew about transparency, but I didn't love how the extra button seemed to make the ColorPicker dialog feel overly technical. Ben in the Community Discord suggested a slider, and I think that approach turned out great.

In addition to a couple other color math functions, I'm using colord here to convert colors from hex to rgba and apply the alpha channel dynamically.