Created attachment 466891 [details] Screenshot of output of above URL Load `data:text/html,<div%20class=container><div%20class=content></div></div><style>.container{color-scheme:dark;width:200px;height:200px;overflow-y:scroll;resize:both;background-color:blue;}.content{width:100%;height:200%;background:red}</style>` The resize handle paints with a dark colour against a dark background leading to poor contrast. The scroll corner also incorrectly has a light border to it which is unexpected.