{"id":1047,"date":"2026-09-07T14:57:16","date_gmt":"2026-09-07T05:57:16","guid":{"rendered":"https:\/\/www.wetch.co.jp\/ai\/?p=1047"},"modified":"2026-09-07T14:57:36","modified_gmt":"2026-09-07T05:57:36","slug":"%e9%85%8d%e8%89%b2%e3%82%92%e3%83%ad%e3%82%b8%e3%83%83%e3%82%af%e3%81%a7%e7%b5%84%e3%81%bf%e7%ab%8b%e3%81%a6%e3%82%8b-oklch%e3%83%bbapca%e3%83%bbai%e3%83%91%e3%83%ac%e3%83%83%e3%83%88","status":"publish","type":"post","link":"https:\/\/www.wetch.co.jp\/ai\/2026\/09\/07\/%e9%85%8d%e8%89%b2%e3%82%92%e3%83%ad%e3%82%b8%e3%83%83%e3%82%af%e3%81%a7%e7%b5%84%e3%81%bf%e7%ab%8b%e3%81%a6%e3%82%8b-oklch%e3%83%bbapca%e3%83%bbai%e3%83%91%e3%83%ac%e3%83%83%e3%83%88\/","title":{"rendered":"\u914d\u8272\u3092\u30ed\u30b8\u30c3\u30af\u3067\u7d44\u307f\u7acb\u3066\u308b\u2014\u2014OKLCH\u30fbAPCA\u30fbAI\u30d1\u30ec\u30c3\u30c8\u751f\u6210\u3067\u4f5c\u308b2026\u5e74\u306e\u30a2\u30af\u30bb\u30b7\u30d6\u30eb\u306a\u30ab\u30e9\u30fc\u8a2d\u8a08"},"content":{"rendered":"

Web\u30c7\u30b6\u30a4\u30f3\u306e\u914d\u8272\u306f\u9577\u3089\u304f\u300c\u30bb\u30f3\u30b9\u3068\u52d8\u300d\u3067\u6c7a\u3081\u308b\u3082\u306e\u3060\u3063\u305f\u3002\u3060\u304c2026\u5e74\u3001\u8272\u306e\u4f5c\u308a\u65b9\u30fb\u6df7\u305c\u65b9\u30fb\u691c\u8a3c\u306e\u4ed5\u65b9\u306f\u3069\u308c\u3082\u6570\u5024\u3067\u6271\u3048\u308b\u30ed\u30b8\u30c3\u30af\u306b\u7f6e\u304d\u63db\u308f\u308a\u3064\u3064\u3042\u308b\u3002\u4eca\u65e5\u306f\u57fa\u790e\u306b\u7acb\u3061\u8fd4\u308a\u3001\u77e5\u899a\u5747\u7b49\u306a\u8272\u7a7a\u9593OKLCH<\/a>\u3001\u30b3\u30f3\u30c8\u30e9\u30b9\u30c8\u306e\u65b0\u57fa\u6e96APCA<\/a>\u3001\u305d\u3057\u3066AI\u30d1\u30ec\u30c3\u30c8\u751f\u6210\u30c4\u30fc\u30eb\u3092\u7d44\u307f\u5408\u308f\u305b\u305f\u30012026\u5e74\u306e\u30a2\u30af\u30bb\u30b7\u30d6\u30eb\u306a\u914d\u8272\u8a2d\u8a08\u306e\u8003\u3048\u65b9\u3092\u6574\u7406\u3059\u308b\u3002<\/em><\/p>\n

\"\u914d\u8272\u8a2d\u8a08\u306e\u30ef\u30fc\u30af\u30d5\u30ed\u30fc\u3092\u8868\u3059\u30a4\u30e9\u30b9\u30c8\"\/<\/figure>\n

\u306a\u305c\u914d\u8272\u304c\u300c\u30ed\u30b8\u30c3\u30af\u300d\u306b\u5411\u304b\u3046\u306e\u304b<\/h2>\n

HEX\u3084RGB\u3067\u8272\u3092\u6271\u3046\u9650\u308a\u3001\u540c\u3058\u300c\u660e\u308b\u3055\u300d\u306b\u898b\u3048\u308b\u8272\u3092\u6570\u5024\u3060\u3051\u3067\u4f5c\u308b\u306e\u306f\u96e3\u3057\u3044\u3002\u8d64\u3068\u9752\u3068\u9ec4\u8272\u3092\u540c\u3058\u660e\u5ea6\u3067\u4e26\u3079\u305f\u3064\u3082\u308a\u304c\u3001\u5b9f\u969b\u306b\u306f\u9ec4\u8272\u3060\u3051\u7729\u3057\u304f\u898b\u3048\u308b\u2014\u2014\u3068\u3044\u3046\u7d4c\u9a13\u306f\u8ab0\u306b\u3067\u3082\u3042\u308b\u306f\u305a\u3060\u3002\u3053\u306e\u77e5\u899a\u306e\u30ba\u30ec\u3092\u89e3\u6d88\u3059\u308b\u305f\u3081\u306b\u751f\u307e\u308c\u305f\u306e\u304c\u3001Bj\u00f6rn Ottosson\u6c0f\u304c2020\u5e74\u306b\u767a\u8868\u3057\u305fOklab\u8272\u7a7a\u9593<\/a>\u3068\u3001\u305d\u306e\u5186\u67f1\u5ea7\u6a19\u7cfb\u3067\u3042\u308bOKLCH<\/strong>\u3060\u3002<\/p>\n

OKLCH\u3068color-mix()\u2014\u2014\u8272\u3092\u300c\u58ca\u3055\u305a\u300d\u52d5\u304b\u3059<\/h2>\n

OKLCH\u306f\u660e\u5ea6(Lightness)\u30fb\u5f69\u5ea6(Chroma)\u30fb\u8272\u76f8(Hue)\u306e3\u5024\u3067\u8272\u3092\u6307\u5b9a\u3059\u308b\u3002\u6700\u5927\u306e\u5229\u70b9\u306f\u3001Lightness\u3092\u56fa\u5b9a\u3057\u305f\u307e\u307e\u8272\u76f8\u3060\u3051\u3092\u5909\u3048\u3066\u3082\u3001\u898b\u305f\u76ee\u306e\u660e\u308b\u3055\u304c\u63c3\u3046\u3053\u3068\u3002\u30c0\u30fc\u30af\u30e2\u30fc\u30c9\u7528\u306e\u6d3e\u751f\u8272\u3084\u30db\u30d0\u30fc\u6642\u306e\u5909\u5316\u8272\u3092\u3001\u611f\u899a\u306b\u983c\u3089\u305a\u6a5f\u68b0\u7684\u306b\u751f\u6210\u3067\u304d\u308b\u3002<\/p>\n

2026\u5e74\u534a\u3070\u306e\u6642\u70b9\u3067OKLCH\u306f\u4e3b\u8981\u30d6\u30e9\u30a6\u30b6\u306e87%\u4ee5\u4e0a\u3067\u30b5\u30dd\u30fc\u30c8\u3055\u308c\u3001\u5b9f\u904b\u7528\u30ec\u30d9\u30eb\u306e\u6280\u8853\u306b\u306a\u3063\u3066\u3044\u308b\u3002\u3042\u308f\u305b\u3066\u4f7f\u3044\u305f\u3044\u306e\u304ccolor-mix()<\/a>\u3068\u76f8\u5bfe\u30ab\u30e9\u30fc\u69cb\u6587\uff08Relative Color Syntax\uff09\u3060\u3002color-mix(in oklch, var(--brand) 80%, white)<\/code>\u306e\u3088\u3046\u306b\u66f8\u3051\u3070\u3001\u65e2\u5b58\u306e\u8272\u3092\u8d77\u70b9\u306b\u30db\u30d0\u30fc\u8272\u3084\u30dc\u30fc\u30c0\u30fc\u8272\u3092\u5f0f\u3067\u751f\u6210\u3067\u304d\u308b\u3002\u4e21\u65b9\u3068\u30822026\u5e74\u6642\u70b9\u3067\u5168\u4e3b\u8981\u30d6\u30e9\u30a6\u30b6\u304c\u5bfe\u5fdc\u3059\u308b\u300cBaseline Widely Available\u300d\u306e\u6a5f\u80fd\u306a\u306e\u3067\u3001\u30c7\u30b6\u30a4\u30f3\u30c8\u30fc\u30af\u30f3\u3092\u624b\u4f5c\u696d\u3067\u91cf\u7523\u3059\u308b\u5fc5\u8981\u306f\u3082\u3046\u306a\u3044\u3002<\/p>\n

OKLCH\u30d9\u30fc\u30b9\u306e\u30ab\u30e9\u30fc\u30b9\u30b1\u30fc\u30eb\u8a2d\u8a08\u306e\u6d41\u308c<\/h3>\n
    \n
  1. \u30d6\u30e9\u30f3\u30c9\u30ab\u30e9\u30fc1\u8272\u3092OKLCH\u3067\u6307\u5b9a\u3059\u308b(oklch(62% 0.19 250)<\/code>\u306e\u3088\u3046\u306a\u5f62\u5f0f)<\/li>\n
  2. \u540c\u3058Chroma\u30fbHue\u306e\u307e\u307e\u3001Lightness\u3060\u3051\u3092\u6bb5\u968e\u7684\u306b\u5909\u3048\u306611\u6bb5\u968e\u7a0b\u5ea6\u306e\u30b9\u30b1\u30fc\u30eb\u3092\u4f5c\u308b<\/li>\n
  3. color-mix()<\/code>\u3067\u30b0\u30ec\u30fc\u3084\u30db\u30ef\u30a4\u30c8\u3068\u6df7\u305c\u3001\u30db\u30d0\u30fc\u30fb\u7121\u52b9\u5316\u30fb\u30c0\u30fc\u30af\u30e2\u30fc\u30c9\u7528\u306e\u6d3e\u751f\u8272\u3092\u5c0e\u51fa\u3059\u308b<\/li>\n
  4. \u6700\u5f8c\u306b\u5404\u7d44\u307f\u5408\u308f\u305b\u306e\u30b3\u30f3\u30c8\u30e9\u30b9\u30c8\u3092\u691c\u8a3c\u3059\u308b(\u6b21\u7ae0)<\/li>\n<\/ol>\n

    \u30b3\u30f3\u30c8\u30e9\u30b9\u30c8\u306e\u65b0\u57fa\u6e96\u300cAPCA\u300d\u3068WCAG 2.2\u306e\u9055\u3044<\/h2>\n

    \u914d\u8272\u8a2d\u8a08\u3067\u907f\u3051\u3066\u901a\u308c\u306a\u3044\u306e\u304c\u30b3\u30f3\u30c8\u30e9\u30b9\u30c8\u3001\u3064\u307e\u308a\u6587\u5b57\u3068\u80cc\u666f\u306e\u8aad\u307f\u3084\u3059\u3055\u306e\u691c\u8a3c\u3060\u3002\u73fe\u884c\u306eWCAG 2.2<\/a>\u306f\u672c\u65874.5:1\u30fb\u5927\u304d\u306a\u6587\u5b573:1\u3068\u3044\u3046\u6bd4\u7387\u30d9\u30fc\u30b9\u306e\u57fa\u6e96\u3092\u4f7f\u3046\u304c\u3001\u3053\u308c\u306f\u300c\u767d\u80cc\u666f\u306b\u9ed2\u6587\u5b57\u300d\u3092\u57fa\u6e96\u306b\u8a2d\u8a08\u3055\u308c\u305f\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3067\u3001\u6697\u3044\u80cc\u666f\u306b\u660e\u308b\u3044\u6587\u5b57\u3092\u7f6e\u304f\u5834\u5408\u306a\u3069\u3001\u5b9f\u969b\u306e\u898b\u3048\u65b9\u3068\u30ba\u30ec\u304c\u751f\u3058\u3084\u3059\u3044\u3068\u3044\u3046\u6307\u6458\u304c\u4ee5\u524d\u304b\u3089\u3042\u3063\u305f\u3002<\/p>\n

    \u305d\u3053\u3067\u767b\u5834\u3057\u305f\u306e\u304c\u3001Andrew Somers\u6c0f(Myndex Research)\u304c\u958b\u767a\u3057\u305fAPCA<\/a>\uff08Accessible Perceptual Contrast Algorithm\uff09<\/strong>\u3060\u3002APCA\u306f\u80cc\u666f\u3068\u6587\u5b57\u8272\u306e\u77e5\u899a\u7684\u306a\u660e\u5ea6\u5dee\u3092\u300cLc\u5024\u300d(\u304a\u3088\u305d\u00b1106\u306e\u7bc4\u56f2)\u3067\u8868\u3057\u3001\u30d5\u30a9\u30f3\u30c8\u30b5\u30a4\u30ba\u3084\u592a\u3055\u306b\u5fdc\u3058\u3066\u5fc5\u8981\u306a\u30b3\u30f3\u30c8\u30e9\u30b9\u30c8\u3092\u5909\u3048\u308b\u3002\u5927\u304d\u304f\u592a\u3044\u6587\u5b57\u306f\u5c0f\u3055\u3044\u6587\u5b57\u3088\u308a\u4f4e\u3044\u30b3\u30f3\u30c8\u30e9\u30b9\u30c8\u3067\u3082\u8aad\u3081\u308b\u3068\u3044\u3046\u3001\u4eba\u9593\u306e\u77e5\u899a\u7279\u6027\u3092\u53cd\u6620\u3057\u305f\u8a2d\u8a08\u306b\u306a\u3063\u3066\u3044\u308b\u3002<\/p>\n

    \u305f\u3060\u30572026\u5e74\u6642\u70b9\u3067APCA\u306fWCAG 3\u306e\u8349\u6848\u304b\u3089\u4e00\u6642\u7684\u306b\u5916\u308c\u3066\u304a\u308a\u3001W3C\u3068\u3057\u3066\u306e\u6b63\u5f0f\u306a\u4f4d\u7f6e\u3065\u3051\u306f\u672a\u78ba\u5b9a\u3060\u3002\u5b9f\u52d9\u3067\u306f\u300c\u73fe\u884c\u306e\u6e96\u62e0\u57fa\u6e96\u306fWCAG 2.2\u306e\u307e\u307e\u7dad\u6301\u3057\u3064\u3064\u3001\u30c7\u30b6\u30a4\u30f3\u30b7\u30b9\u30c6\u30e0\u3092\u5237\u65b0\u3059\u308b\u30bf\u30a4\u30df\u30f3\u30b0\u3067APCA\u3082\u4e26\u884c\u3057\u3066\u30c6\u30b9\u30c8\u3057\u3066\u304a\u304f\u300d\u3068\u3044\u3046\u306e\u304c\u73fe\u5b9f\u7684\u306a\u7dda\u306b\u306a\u308b\u3002<\/p>\n\n\n\n\n\n\n
    \u57fa\u6e96<\/th>\n\u5358\u4f4d<\/th>\n\u76ee\u5b89<\/th>\n2026\u5e74\u306e\u4f4d\u7f6e\u3065\u3051<\/th>\n<\/tr>\n<\/thead>\n
    WCAG 2.2<\/td>\n\u30b3\u30f3\u30c8\u30e9\u30b9\u30c8\u6bd4<\/td>\n\u672c\u65874.5:1 \/ \u5927\u304d\u306a\u6587\u5b573:1<\/td>\n\u73fe\u884c\u306e\u6b63\u5f0f\u306a\u6e96\u62e0\u57fa\u6e96<\/td>\n<\/tr>\n
    APCA<\/td>\nLc\u5024(\u00b1106)<\/td>\n\u672c\u6587Lc60\u524d\u5f8c\u304c\u76ee\u5b89<\/td>\nWCAG 3\u306e\u8349\u6848\u304b\u3089\u4e00\u6642\u9664\u5916\u3001\u5148\u884c\u5c0e\u5165\u304c\u9032\u3080<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    AI\u30d1\u30ec\u30c3\u30c8\u751f\u6210\u30c4\u30fc\u30eb\u3067\u201c\u305f\u305f\u304d\u53f0\u201d\u3092\u901f\u304f\u4f5c\u308b<\/h2>\n

    \u30bc\u30ed\u304b\u3089\u914d\u8272\u3092\u7d44\u3080\u306e\u3067\u306f\u306a\u304f\u3001AI\u306b\u5019\u88dc\u3092\u51fa\u3055\u305b\u3066\u304b\u3089\u8abf\u6574\u3059\u308b\u6d41\u308c\u3082\u5b9a\u7740\u3057\u3066\u304d\u305f\u3002\u4ee3\u8868\u7684\u306a\u30c4\u30fc\u30eb\u3092\u6319\u3052\u308b\u3002<\/p>\n\n\n\n\n\n\n\n\n
    \u30c4\u30fc\u30eb<\/th>\n\u7279\u5fb4<\/th>\n<\/tr>\n<\/thead>\n
    Huemint<\/a><\/td>\n\u3069\u306e\u8272\u304c\u80cc\u666f\u30fb\u524d\u666f\u30fb\u30a2\u30af\u30bb\u30f3\u30c8\u304b\u3092\u7406\u89e3\u3057\u305f\u6a5f\u68b0\u5b66\u7fd2\u30e2\u30c7\u30eb\u3067\u914d\u8272\u3092\u751f\u6210\u3002\u8272\u3092\u30ed\u30c3\u30af\u3057\u3066\u518d\u751f\u6210\u3067\u304d\u3001CSS\u5909\u6570\u3084JSON\u3067\u66f8\u304d\u51fa\u305b\u308b<\/td>\n<\/tr>\n
    Coolors<\/a><\/td>\n\u30b9\u30da\u30fc\u30b9\u30ad\u30fc\u3067\u9ad8\u901f\u306b\u914d\u8272\u6848\u3092\u5207\u308a\u66ff\u3048\u3089\u308c\u308b\u5b9a\u756a\u30c4\u30fc\u30eb\u3002AI\u30e2\u30fc\u30c9\u3082\u642d\u8f09<\/td>\n<\/tr>\n
    Adobe Color<\/a><\/td>\n\u5358\u8272\u306e\u7d44\u307f\u5408\u308f\u305b\u3060\u3051\u3067\u306a\u304f\u30d1\u30ec\u30c3\u30c8\u5168\u4f53\u306e\u30b3\u30f3\u30c8\u30e9\u30b9\u30c8\u30c1\u30a7\u30c3\u30af\u3082\u53ef\u80fd<\/td>\n<\/tr>\n
    Accessible Palette Studio<\/a><\/td>\nOKLCH\u306e11\u6bb5\u968e\u30b9\u30b1\u30fc\u30eb\u751f\u6210\u3001APCA\u306b\u3088\u308b\u63a1\u70b9\u3001\u8272\u899a\u591a\u69d8\u6027\u30b7\u30df\u30e5\u30ec\u30fc\u30b7\u30e7\u30f3\u3001Tailwind\/Figma\u5411\u3051\u306e\u66f8\u304d\u51fa\u3057\u307e\u3067\u4e00\u62ec\u5bfe\u5fdc<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    \u7279\u306bAccessible Palette Studio<\/a>\u306e\u3088\u3046\u306b\u300cOKLCH\u3067\u4f5c\u308b\u2192APCA\u3067\u63a1\u70b9\u3059\u308b\u2192\u30c7\u30b6\u30a4\u30f3\u30b7\u30b9\u30c6\u30e0\u306e\u5f62\u5f0f\u3067\u66f8\u304d\u51fa\u3059\u300d\u307e\u3067\u3092\u4e00\u6c17\u901a\u8cab\u3067\u3084\u3063\u3066\u304f\u308c\u308b\u30c4\u30fc\u30eb\u306f\u3001\u4eca\u65e5\u7d39\u4ecb\u3057\u305f\u8003\u3048\u65b9\u3092\u305d\u306e\u307e\u307e\u5b9f\u88c5\u306b\u843d\u3068\u3057\u8fbc\u3081\u308b\u70b9\u3067\u5b9f\u52d9\u5411\u304d\u3060\u3002<\/p>\n

    \"\u30d1\u30f3\u30c8\u30fc\u30f3\u306e\u30ab\u30e9\u30fc\u30c1\u30c3\u30d7\u30d6\u30c3\u30af\"\/
    Photo: Ciokka \/ CC BY 2.0<\/a>, Openverse\u7d4c\u7531<\/a><\/figcaption><\/figure>\n

    \u4eca\u65e5\u304b\u3089\u4f7f\u3048\u308b\u914d\u8272\u30c1\u30a7\u30c3\u30af\u30ea\u30b9\u30c8<\/h2>\n