Internet Explorerの:focus擬似セレクタ - Yohei Isokawa
Remove webkit border on input on focus | The Electric Toolbox Blog
Copy the Browser's Native Focus Styles | CSS-Tricks - CSS-Tricks
CSS - Div focus change blue border highlight color - Stack Overflow
Sass 3.2: Silent Classes - Speaker Deck
フォーカスの「黒枠」の色を変更するには / 新しいのが良いか悪いか | PersonWriter's Room
Removing that ugly :focus ring (and keeping it too) | by David Gilbertson | HackerNoon.com | Medium
Copy the Browser's Native Focus Styles | CSS-Tricks - CSS-Tricks
Focus Ring on the codeeditor search for no matches · Issue #4482 · octobercms/october · GitHub
フォーカスの「黒枠」の色を変更するには / 新しいのが良いか悪いか | PersonWriter's Room
Focus ring default styles
Strange black outline on all S.O and on browsers - Microsoft Community
Mimic native browser focus styles — Ionuț Colceriu
WebKit focus ring color in Chrome browser | DebugAH
Chromeのoutline autoをFirefoxで使いたい : (*x).b=z->a+y/c
What is -webkit-focus-ring-color? - Stack Overflow
টুইটারে CSS-Tricks: "Copy the Browser's Native Focus Styles https://t.co/SHbck7s83j" / টুইটার
WebKit focus ring color in Chrome browser | DebugAH
各ブラウザごとのデフォルトのスタイルシート、user agent stylesheetのまとめ -Chrome, Safari, Firefox, Edge | コリス
WebKit focus ring color in Chrome browser | DebugAH
Disabling orange focus outline around Bootstrap buttons in Electron - Stack Overflow
Chosen outline color on focus doesn't match browser default · Issue #1451 · harvesthq/chosen · GitHub
What is -webkit-focus-ring-color? - Stack Overflow
Chrome: Black outline on :focus state on several UI elements · Issue #15113 · zulip/zulip · GitHub
