{"id":9112,"date":"2025-09-08T13:22:43","date_gmt":"2025-09-08T04:22:43","guid":{"rendered":"https:\/\/fastcoding.jp\/blog\/?p=9112"},"modified":"2025-09-19T14:59:30","modified_gmt":"2025-09-19T05:59:30","slug":"%e9%9b%a2%e8%84%b1%e7%8e%87%e3%82%92%e4%b8%8b%e3%81%92%e3%82%8b%ef%bc%81%e6%9c%80%e6%96%b0css%e3%81%a7%e5%ae%9f%e7%8f%be%e3%81%99%e3%82%8b%e8%aa%ad%e3%81%bf%e3%82%84%e3%81%99%e3%81%84web","status":"publish","type":"post","link":"https:\/\/fastcoding.jp\/blog\/all\/ui-ux\/%e9%9b%a2%e8%84%b1%e7%8e%87%e3%82%92%e4%b8%8b%e3%81%92%e3%82%8b%ef%bc%81%e6%9c%80%e6%96%b0css%e3%81%a7%e5%ae%9f%e7%8f%be%e3%81%99%e3%82%8b%e8%aa%ad%e3%81%bf%e3%82%84%e3%81%99%e3%81%84web\/","title":{"rendered":"\u96e2\u8131\u7387\u3092\u4e0b\u3052\u308b\uff01\u6700\u65b0CSS\u3067\u5b9f\u73fe\u3059\u308b\u201c\u8aad\u307f\u3084\u3059\u3044Web\u4f53\u9a13\u201d"},"content":{"rendered":"
\n

\u3053\u3093\u306b\u3061\u306f\uff01\u682a\u5f0f\u4f1a\u793e\u30d5\u30a1\u30b9\u30c8\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u306eWeb\u30c7\u30a3\u30ec\u30af\u30bf\u30fc\u3001\u50cd\u304f\u304a\u304b\u3093\u3067\u3059\uff01<\/p>\n\n\n\n

\u6700\u8fd1\u3001Web\u30c7\u30b6\u30a4\u30f3\u306e\u6d41\u884c\u304c\u76ee\u307e\u3050\u308b\u3057\u304f\u5909\u308f\u3063\u3066\u3044\u307e\u3059\u3002\u7279\u306b\u3001AI\u304c\u691c\u7d22\u7d50\u679c\u306b\u5f71\u97ff\u3092\u4e0e\u3048\u3001\u5358\u306b\u30ad\u30fc\u30ef\u30fc\u30c9\u3092\u4e26\u3079\u308b\u3060\u3051\u3067\u306f\u901a\u7528\u3057\u306a\u304f\u306a\u308a\u307e\u3057\u305f\u3002Web\u30c7\u30a3\u30ec\u30af\u30bf\u30fc\u306e\u7686\u3055\u3093\u3001\u3054\u81ea\u8eab\u306e\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3067\u30e6\u30fc\u30b6\u30fc\u304c\u30da\u30fc\u30b8\u3092\u3059\u3050\u306b\u96e2\u308c\u3066\u3057\u307e\u3046\u60a9\u307f\u3092\u62b1\u3048\u3066\u3044\u307e\u305b\u3093\u304b\uff1f\u305d\u3093\u306a\u4e2d\u3001CSS\u3092\u4f7f\u3063\u305f\u53ef\u8aad\u6027\u306e\u5411\u4e0a\u304c\u3001UX\u306e\u6700\u9069\u5316\u3084\u96e2\u8131\u7387\u306e\u6539\u5584\u306b\u5f79\u7acb\u3064\u3053\u3068\u3092\u3054\u5b58\u3058\u3067\u3057\u3087\u3046\u304b\u3002\u4eca\u56de\u306f\u3001\u682a\u5f0f\u4f1a\u793e\u30d5\u30a1\u30b9\u30c8\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u306eWeb\u30c7\u30a3\u30ec\u30af\u30bf\u30fc\u3067\u3042\u308b\u79c1\u304c\u3001\u6700\u65b0\u306eCSS\u6280\u8853\u3092\u6d3b\u7528\u3057\u3066\u4f5c\u308a\u51fa\u3059\u201c\u8aad\u307f\u3084\u3059\u3044Web\u4f53\u9a13\u201d\u3092\u3054\u7d39\u4ecb\u3044\u305f\u3057\u307e\u3059\u3002<\/p>\n\n\n\n

\u3053\u308c\u307e\u3067\u306e\u30c7\u30b6\u30a4\u30f3\u306e\u9650\u754c<\/h3>\n\n\n\n

Web\u5236\u4f5c\u306e\u73fe\u5834\u3067\u306f\u3001\u300c\u3082\u3063\u3068\u898b\u3084\u3059\u304f\u3057\u3066\u307b\u3057\u3044\u300d\u3068\u3044\u3046\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u306e\u8981\u671b\u304c\u5897\u3048\u3066\u3044\u308b\u306e\u3067\u306f\u306a\u3044\u3067\u3057\u3087\u3046\u304b\u3002\u4ee5\u524d\u306f\u7f8e\u3057\u3044\u30c7\u30b6\u30a4\u30f3\u3084\u52d5\u7684\u306a\u30a8\u30d5\u30a7\u30af\u30c8\u304c\u91cd\u8996\u3055\u308c\u307e\u3057\u305f\u304c\u3001\u305d\u308c\u3060\u3051\u3067\u306f\u30e6\u30fc\u30b6\u30fc\u3092\u5f15\u304d\u3064\u3051\u7d9a\u3051\u308b\u3053\u3068\u304c\u56f0\u96e3\u3067\u3059\u3002\u3084\u306f\u308a\u300c\u8aad\u307f\u3084\u3059\u3044\u300d\u3001\u300c\u30b3\u30f3\u30d0\u30fc\u30b8\u30e7\u30f3\u3057\u3084\u3059\u3044\u300d\u30da\u30fc\u30b8\u3067\u7121\u3051\u308c\u3070\u610f\u5473\u304c\u7121\u3044\u3067\u3059\u3088\u306d\u3002\u305d\u3053\u3067\u30c7\u30b6\u30a4\u30f3\u3092\u5927\u304d\u304f\u5909\u3048\u305a\u3001CSS\u3092\u6d3b\u7528\u3057\u305f\u53ef\u8aad\u6027\u306e\u5411\u4e0a\u304c\u91cd\u8981\u8996\u3055\u308c\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u305f\u3002<\/p>\n\n\n\n

CSS\u306e\u53ef\u8aad\u6027\u3092\u9ad8\u3081\u308b\u3053\u3068\u3067\u3001\u30e6\u30fc\u30b6\u30fc\u304c\u30b9\u30c8\u30ec\u30b9\u306a\u304f\u60c5\u5831\u3092\u53d7\u3051\u53d6\u308c\u308b\u3088\u3046\u306b\u306a\u308a\u3001\u7d50\u679c\u3068\u3057\u3066\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u306e\u6c42\u3081\u308b\u30b3\u30f3\u30d0\u30fc\u30b8\u30e7\u30f3\u7387\u306e\u6539\u5584\u306b\u3082\u3064\u306a\u304c\u308a\u307e\u3059\u3002\u91cd\u8981\u306a\u306e\u306f\u3001\u30e6\u30fc\u30b6\u30fc\u306b\u5feb\u9069\u306a\u4f53\u9a13\u3092\u63d0\u4f9b\u3059\u308b\u3053\u3068\u3067\u3059\u3002<\/p>\n\n\n\n

\n\n\n\n

\u6539\u5584\u30dd\u30a4\u30f3\u30c8\u306e\u4e00\u4f8b\uff5e\u30d5\u30a9\u30f3\u30c8\u30b5\u30a4\u30ba\u3068\u884c\u9593<\/h3>\n\n\n\n

\u4f8b\u3048\u3070\u3042\u308b\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3067\u306f\u3001\u30ec\u30b9\u30dd\u30f3\u30b7\u30d6\u30c7\u30b6\u30a4\u30f3\u306e\u4e00\u74b0\u3068\u3057\u3066\u3001\u30d5\u30a9\u30f3\u30c8\u30b5\u30a4\u30ba\u3084\u884c\u9593\u3092\u52d5\u7684\u306b\u8abf\u6574\u3057\u307e\u3057\u305f\u3002\u30c7\u30b6\u30a4\u30f3\u306f\u5909\u3048\u305a\u306b\u3001\u3067\u3059\u3002\u305d\u306e\u7d50\u679c\u3001\u30e6\u30fc\u30b6\u30fc\u304c\u3069\u306e\u30c7\u30d0\u30a4\u30b9\u304b\u3089\u898b\u3066\u3082\u540c\u69d8\u306b\u898b\u3084\u3059\u3044\u30da\u30fc\u30b8\u3092\u63d0\u4f9b\u3067\u304d\u307e\u3057\u305f\u3002<\/p>\n\n\n\n

CSS\u898b\u76f4\u3057\u306e\u30b3\u30c4<\/h4>\n\n\n\n
    \n
  1. \u30d5\u30a9\u30f3\u30c8\u30b5\u30a4\u30ba\u3068\u884c\u9593\u306e\u898b\u76f4\u3057<\/strong>
    \u5c0f\u3055\u3059\u304e\u308b\u30d5\u30a9\u30f3\u30c8\u3084\u72ed\u3059\u304e\u308b\u884c\u9593\u306f\u8aad\u307f\u3065\u3089\u3055\u306e\u539f\u56e0\u3067\u3059\u3002rem\u5358\u4f4d\u3092\u5229\u7528\u3057\u305f\u30d5\u30a9\u30f3\u30c8\u30b5\u30a4\u30ba\u8a2d\u5b9a\u306f\u3001\u30ec\u30b9\u30dd\u30f3\u30b7\u30d6\u30c7\u30b6\u30a4\u30f3\u306b\u6b20\u304b\u305b\u307e\u305b\u3093\u3002
    <\/li>\n\n\n\n
  2. \u6587\u5b57\u306e\u914d\u8272\u3068\u30b3\u30f3\u30c8\u30e9\u30b9\u30c8\u306e\u8abf\u6574<\/strong>
    \u898b\u3084\u3059\u3044\u6587\u5b57\u8272\u306f\u30e6\u30fc\u30b6\u30fc\u4f53\u9a13\u3092\u5411\u4e0a\u3055\u305b\u307e\u3059\u3002\u80cc\u666f\u8272\u3068\u30c6\u30ad\u30b9\u30c8\u8272\u306e\u30b3\u30f3\u30c8\u30e9\u30b9\u30c8\u3092\u9069\u5207\u306b\u8a2d\u5b9a\u3059\u308b\u3053\u3068\u3067\u3001\u8996\u8a8d\u6027\u3068\u8aad\u307f\u3084\u3059\u3055\u304c\u6539\u5584\u3055\u308c\u307e\u3059\u3002
    <\/li>\n\n\n\n
  3. \u4f59\u767d\u306e\u6d3b\u7528<\/strong>
    \u8a18\u4e8b\u3084\u30b3\u30f3\u30c6\u30f3\u30c4\u9593\u306b\u5341\u5206\u306a\u30b9\u30da\u30fc\u30b9\u3092\u8a2d\u3051\u308b\u3053\u3068\u3067\u3001\u8996\u899a\u7684\u306b\u4f59\u88d5\u3092\u6301\u305f\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u60c5\u5831\u304c\u6574\u7406\u3055\u308c\u3001\u4f1d\u308f\u308a\u3084\u3059\u304f\u306a\u308a\u307e\u3059\u3002<\/li>\n<\/ol>\n\n\n\n

    \u5177\u4f53\u7684\u306a\u66f8\u304d\u65b9\uff08\u4f8b\uff09<\/h4>\n\n\n\n

    \u4ee5\u4e0b\u306b\u5177\u4f53\u7684\u306a\u5b9f\u88c5\u4f8b\u3092\u3054\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n\n\n

    \n<article>\n  <h1>\u8aad\u307f\u3084\u3059\u3044Web\u4f53\u9a13\u3092\u63d0\u4f9b\u3059\u308b\u65b9\u6cd5<\/h1>\n  <p>CSS\u3092\u6d3b\u7528\u3057\u3001\u52b9\u679c\u7684\u306b\u30e6\u30fc\u30b6\u30fc\u4f53\u9a13\u3092\u5411\u4e0a\u3055\u305b\u307e\u3057\u3087\u3046\u3002<\/p>\n<\/article>\n<\/pre><\/div>\n\n
    \narticle {\n  max-width: 600px;\n  margin: 0 auto;\n  padding: 1rem;\n  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;\n  background-color: #f9f9f9;\n  color: #444;\n}\n\nh1 {\n  font-size: 2rem;\n  margin-bottom: 0.5rem;\n}\n\np {\n  font-size: 1rem;\n  line-height: 1.6;\n}\n<\/pre><\/div>\n\n\n
    \u5b9f\u969b\u306b\u5f0a\u793e\u3067\u304a\u53d7\u3051\u3057\u305f\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306e\u8a71\u3067\u3059\u304c\u3001\u3068\u3042\u308bEC\u30b5\u30a4\u30c8\u69d8\u306e\u6848\u4ef6\u3067\u306f\u3001\u5546\u54c1\u8aac\u660e\u306e\u30c6\u30ad\u30b9\u30c8\u3092\u898b\u3084\u3059\u304f\u3059\u308b\u305f\u3081CSS\u3092\u898b\u76f4\u3057\u307e\u3057\u305f\u3002\u3082\u3068\u3082\u3068\u9ad8\u304b\u3063\u305f\u96e2\u8131\u7387\u304c\u3001\u30d5\u30a9\u30f3\u30c8\u3084\u8272\u5473\u3068\u884c\u9593\u3092\u6539\u5584\u3057\u305f\u7d50\u679c\u3001\u30b3\u30f3\u30d0\u30fc\u30b8\u30e7\u30f3\u7387\u304c15%\u5411\u4e0a\u3057\u307e\u3057\u305f\u3002\u307e\u305f\u3001\u30e6\u30fc\u30b6\u30fc\u306e\u6ede\u5728\u6642\u9593\u308220%\u5ef6\u3073\u307e\u3057\u305f\u3002<\/p>\n\n\n\n
    \n\n\n\n
    \u6539\u5584\u30dd\u30a4\u30f3\u30c8\u306e\u4e00\u4f8b\uff5e\u914d\u8272\u3068\u30b3\u30f3\u30c8\u30e9\u30b9\u30c8<\/h3>\n\n\n\n
    \u300c\u306a\u3093\u3068\u306a\u304f\u8aad\u307f\u306b\u304f\u3044\u300d\u3092\u6700\u521d\u306b\u89e3\u6d88\u3059\u308b\u306e\u304c\u914d\u8272\u3067\u3059\u3002\u80cc\u666f\u3068\u6587\u5b57\u306e\u660e\u5ea6\u5dee\u304c\u8db3\u308a\u306a\u3044\u3068\u672c\u6587\u304c\u201c\u8584\u304f\u201d\u898b\u3048\u3001\u30ea\u30f3\u30af\u8272\u304c\u672c\u6587\u3068\u8fd1\u3044\u3068\u62bc\u305b\u308b\u5834\u6240\u304c\u5206\u304b\u308a\u307e\u305b\u3093\u3002\u307e\u305a\u306f\u672c\u6587\u30fb\u898b\u51fa\u3057\u30fb\u30ea\u30f3\u30af\u306e\u30b3\u30f3\u30c8\u30e9\u30b9\u30c8\u3092\u6574\u3048\u3001\u201c\u8aad\u3080\u8ca0\u62c5\u3092\u8efd\u304f\u3059\u308b\u201d\u2192\u201c\u884c\u52d5\u306e\u8ff7\u3044\u3092\u6e1b\u3089\u3059\u201d<\/strong>\u306e\u9806\u306b\u5e95\u4e0a\u3052\u3057\u307e\u3059\u3002<\/p>\n\n\n\n
    \u203b\u3061\u306a\u307f\u306b\u304a\u5ba2\u69d8\u306b\u3088\u304f\u805e\u304b\u308c\u308b\u306e\u304c\u3001\u30da\u30fc\u30b8\u306e\u30b3\u30f3\u30c8\u30e9\u30b9\u30c8\u3092\u30c1\u30a7\u30c3\u30af\u3059\u308b\u306b\u306f\u3069\u3046\u3057\u305f\u3089\u3044\u3044\u306e\u304b\uff1f\u3068\u3044\u3046\u304a\u8a71\u3067\u3059\u3002\u5f0a\u793e\u306f\u3053\u3061\u3089\u306eChrome\u306e\u30c4\u30fc\u30eb\u3092\u304a\u52e7\u3081\u3057\u3066\u3044\u307e\u3059\u3002
    Color Contrast Checker https:\/\/chromewebstore.google.com\/detail\/color-contrast-checker\/gbfgefkhkofclanlcgnhlbmfgjjomock?hl=en<\/a><\/p>\n\n\n\n
    CSS\u898b\u76f4\u3057\u306e\u30b3\u30c4<\/h4>\n\n\n\n
      \n
    1. \u30b3\u30f3\u30c8\u30e9\u30b9\u30c8\u306e\u76ee\u5b89\u306f \u672c\u6587 4.5:1 \u4ee5\u4e0a\uff0f\u898b\u51fa\u3057\u30fb\u5927\u6587\u5b57 3:1 \u4ee5\u4e0a<\/strong>\uff08WCAG \u306e\u4e00\u822c\u7684\u76ee\u5b89\uff09\u3002<\/li>\n\n\n\n
    2. \u30ea\u30f3\u30af\u306f\u672c\u6587\u3068\u306f\u3063\u304d\u308a\u5dee<\/strong>\u3092\u3064\u3051\u3001hover\/focus \u3067\u201c\u62bc\u305b\u308b\u201d\u72b6\u614b\u3092\u4e00\u8cab\u3002<\/li>\n\n\n\n
    3. prefers-color-scheme<\/code> \u3067\u30e9\u30a4\u30c8\uff0f\u30c0\u30fc\u30af\u3092\u5207\u66ff\u3048\u3002<\/li>\n\n\n\n
    4. \u5f37\u8abf\u306f\u592a\u5b57\uff0b\u660e\u5ea6\u5dee<\/strong>\u304c\u57fa\u672c\u3002\u5f69\u5ea6\u3092\u4e0a\u3052\u3059\u304e\u308b\u3068\u75b2\u308c\u307e\u3059\u3002<\/li>\n<\/ol>\n\n\n\n
      \u5177\u4f53\u7684\u306a\u66f8\u304d\u65b9\uff08\u4f8b\uff09<\/h4>\n\n\n
      \n:root {\n  --bg: #fff; --text: #1b1b1b; --muted: #666;\n  --link: #0b66ff; --link-hover: #084bcc;\n}\n@media (prefers-color-scheme: dark) {\n  :root {\n    --bg: #111; --text: #e9e9e9; --muted: #aaa;\n    --link: #79a8ff; --link-hover: #a9c8ff;\n  }\n}\nbody { background: var(--bg); color: var(--text); }\nsmall, .meta { color: var(--muted); }\na {\n  color: var(--link);\n  text-decoration: underline;\n  text-underline-offset: 0.15em;\n  text-decoration-thickness: 0.08em;\n}\na:hover, a:focus {\n  color: var(--link-hover);\n  text-decoration-thickness: 0.12em;\n  outline: none;\n}\n<\/pre><\/div>\n\n\n
      \u5931\u6557\u3042\u308b\u3042\u308b<\/h4>\n\n\n\n