Is it possible to generate a gradient similar to this style of color picker? Where the full saturated, 50% brightness values are on the outside, and towards the inside it goes to 100% brightness.
Here you go.
html, body {margin:0; width:100%; height:100%; background: black}
.colorpicker {
width:100vmin; height:100vmin; margin:0 auto;
border-radius:100%;
background:
linear-gradient(0deg, #00F, rgba(255, 255,255,0), rgba(255, 255,255,0))
, linear-gradient(60deg, #0FF, rgba(255, 255,255,0), rgba(255, 255,255,0))
, linear-gradient(120deg, #0F0, rgba(255, 255,255,0), rgba(255, 255,255,0))
, linear-gradient(180deg, #FF0, rgba(255, 255,255,0), rgba(255, 255,255,0))
, linear-gradient(240deg, #F00, rgba(255, 255,255,0), rgba(255, 255,255,0))
, #FFF linear-gradient(300deg, #F0F, rgba(255, 255,255,0), rgba(255, 255,255,0))
}
<div class="colorpicker"></div>