The new color wheel introduced as part of https://bugs.webkit.org/show_bug.cgi?id=124354 is canvas-based and hasn't been tested on Retina displays. This bug covers any task related to providing a great experience for color picking on Retina displays.
<rdar://problem/15469587>
It is blurry around the edges.
Created attachment 224218 [details] Patch
Created attachment 224236 [details] Patch for landing
https://trac.webkit.org/changeset/164117