[1] Improving Color on the Web | WebKit ( (8/23/2016, 11:34:53 AM)) <https://webkit.org/blog/6682/improving-color-on-the-web/>

[2] [mediaqueries-4] Inline enough info about color spaces (frivoal著, 8/14/2017, 10:24:54 AM) <https://github.com/w3c/csswg-drafts/commit/45ed68824bd40f648cc5250960e13466b94d36af>