As you may know, many of the HTML5 input types have been defined, but do not have a recommended or consistent experience across operating systems, nor browsers.
Recently, the team at work and I discussed whether we should use the default HTML5 input type of ‘color’ or roll our own. As of December 2020, here’s what each picker experience looks like in the following browser and OS combos.
Since there is no single uniform value that a user could define across any channel, I personally would recommend any site or application use or create a bullet-proof cross-platform solution, especially if you must handle RGBA-like colors or need a consistent experience. If you are looking to MVP a product, are exclusively looking to support only a limited set of devices, or color selection isn’t super crucial to your app, the HTML5 defaults will likely serve you well.