\u7a7a\u95f4
\n\u00a0
\n\u5728css3\u4e4b\u524d\uff0c\u5728\u6837\u5f0f\u4e2d\u6307\u5b9a\u7684\u989c\u8272\u503c\u53ea\u80fd\u4e3aRGB\u989c\u8272\u503c\uff0c\u5e76\u4e14\u53ea\u80fd\u901a\u8fc7opacity\u5c5e\u6027\u6765\u8bbe\u7f6e\u5143\u7d20\u7684\u900f\u660e\u5ea6\u3002CSS3\u4e2d\u589e\u52a0\u4e863\u79cd\u989c\u8272\u503c-RGBA\u989c\u8272\u503c\uff0cHSL\u989c\u8272\u503c\u53caHSLA\u989c\u8272\u503c\uff0c\u5e76\u4e14\u5141\u8bb8\u901a\u8fc7\u5bf9RGBA\u989c\u8272\u503c\u548cHSLA\u989c\u8272\u503c\u8bbe\u5b9aalpha\u901a\u9053\u7684\u65b9\u6cd5\u6765\u66f4\u52a0\u5bb9\u6613\u5730\u5b9e\u73b0\u5c06\u534a\u900f\u660e\u6587\u5b57\u4e0e\u56fe\u50cf\u4e92\u76f8\u91cd\u53e0\u7684\u6548\u679c\u3002<\/p>\n
\u4e00.\u989c\u8272\u76f8\u5173\u6837\u5f0f<\/p>\n
1.\u5229\u7528alpha\u901a\u9053\u6765\u8bbe\u5b9a\u989c\u8272<\/p>\n
(1)\u5bf9RGB\u989c\u8272\u8bbe\u5b9aalpha\u901a\u9053<\/p>\n
\u5728css3\u4e2d\uff0c\u53ef\u4ee5\u901a\u8fc7\u5bf9RGB\u989c\u8272\u8bbe\u5b9aalpha\u901a\u9053\u7684\u65b9\u6cd5\u6765\u5b9a\u4e49RGBA\u989c\u8272\u3002\u6240\u8c13RGBA\u989c\u8272\uff0c\u662f\u6307\u5229\u7528\u7ea2\u8272\u503c(R)\uff0c\u7eff\u8272\u503c(G)\uff0c\u84dd\u8272\u503c(B)\uff0calpha\u901a\u9053\u503c(A)\u6765\u5b9a\u4e49\u7684\u989c\u8272\u3002\u5176\u4e2d\uff0calpha\u901a\u9053\u503c\u7684\u8303\u56f4\u4e3a0-1.0\uff0c0\u8868\u793a\u5b8c\u5168\u900f\u660e\uff0c1\u8868\u793a\u4e0d\u900f\u660e\u3002\u4f7f\u7528\u65b9\u6cd5\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n
background-color:\u00a0rgba(255,0,0,0.5);<\/p>\n
(2)\u5bf9HSL\u989c\u8272\u8bbe\u5b9aalpha\u901a\u9053<\/p>\n
\u5728css3\u4e2d\uff0c\u9664\u4e86\u53ef\u4ee5\u4f7f\u7528RGB\u989c\u8272\u5916\uff0c\u8fd8\u53ef\u4ee5\u4f7f\u7528HSL\u989c\u8272\u3002HSL\u989c\u8272\u4f7f\u7528\u8272\u8c03(H)\uff0c\u9971\u548c\u5ea6(S)\uff0c\u4eae\u5ea6(L)\u6765\u5b9a\u4e49\u989c\u8272\u3002\u5176\u4e2d\uff0c\u8272\u8c03\u503c\u4e2d\u75280\u6216360\u8868\u793a\u7ea2\u8272\uff0c120\u8868\u793a\u7eff\u8272\uff0c240\u8868\u793a\u84dd\u8272\uff0c\u5f53\u53d6\u503c\u5927\u4e8e360\u65f6\uff0c\u5b9e\u9645\u7684\u503c\u7b49\u4e8e\u8be5\u503c\u9664\u4ee5360\u4e4b\u540e\u7684\u4f59\u6570\u3002\u9971\u548c\u5ea6\u548c\u4eae\u5ea6\u7684\u53d6\u503c\u8303\u56f4\u5747\u4e3a0%\u5230100%\u3002\u53ef\u4ee5\u901a\u8fc7\u5bf9HSL\u989c\u8272\u8bbe\u5b9aalpha\u901a\u9053\u7684\u65b9\u6cd5\u6765\u5b9a\u4e49HSLA\u989c\u8272\u3002HSLA\u989c\u8272\u662f\u6307\u5229\u7528\u8272\u8c03(H)\uff0c\u9971\u548c\u5ea6(S)\uff0c\u4eae\u5ea6(L)\uff0calpha\u901a\u9053\u503c(A)\u6765\u5b9a\u4e49\u989c\u8272\u3002<\/p>\n
2.alpha\u901a\u9053\u4e0eopacity\u5c5e\u6027\u7684\u533a\u522b<\/p>\n
opacity\u5c5e\u6027\u65f6css\u4e2d\u4e13\u95e8\u7528\u6765\u6307\u5b9a\u900f\u660e\u5ea6\u7684\u4e00\u4e2a\u5c5e\u6027\uff0c\u53d6\u503c\u8303\u56f4\u4e5f\u57280-1\u4e4b\u95f4\uff0c0\u8868\u793a\u5b8c\u5168\u900f\u660e\uff0c1\u8868\u793a\u4e0d\u900f\u660e\u3002\u4f7f\u7528alpha\u901a\u9053\u5bf9\u5143\u7d20\u8bbe\u5b9a\u900f\u660e\u5ea6\u65f6\uff0c\u53ef\u4ee5\u5355\u72ec\u9488\u5bf9\u5143\u7d20\u7684\u80cc\u666f\u8272\u548c\u6587\u5b57\u989c\u8272\u7b49\u6765\u6307\u5b9a\u900f\u660e\u5ea6\uff0c\u800copacity\u5c5e\u6027\u53ea\u80fd\u6307\u5b9a\u6574\u4e2a\u5143\u7d20\u7684\u900f\u660e\u5ea6\u3002<\/p>\n
3.\u6307\u5b9a\u989c\u8272\u503c\u4e3atransparent<\/p>\n
\u5982\u679c\u5c06\u989c\u8272\u503c\u6307\u5b9a\u4e3atransparent\uff0c\u5219\u4f1a\u5c06\u80cc\u666f\uff0c\u6587\u5b57\u6216\u8fb9\u6846\u7b49\u7684\u989c\u8272\u8bbe\u5b9a\u4e3a\u5b8c\u5168\u900f\u660e\uff0c\u76f8\u5f53\u4e8e\u4f7f\u7528\u4e86\u503c\u4e3a0\u7684alpha\u901a\u9053\u3002\u4e5f\u5c31\u662f\u8bf4\uff0c\u5728css3\u4e2d\uff0c\u53ef\u4ee5\u5728\u4e00\u5207\u6307\u5b9a\u989c\u8272\u503c\u7684\u5c5e\u6027\u4e2d\u6307\u5b9atransparent\u503c\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u7a7a\u95f4 \u00a0 \u5728css3\u4e4b\u524d\uff0c\u5728\u6837\u5f0f\u4e2d\u6307\u5b9a\u7684\u989c\u8272\u503c\u53ea\u80fd\u4e3aRGB\u989c\u8272\u503c\uff0c\u5e76\u4e14\u53ea\u80fd\u901a\u8fc7opacity\u5c5e\u6027\u6765\u8bbe\u7f6e\u5143\u7d20\u7684\u900f […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4],"tags":[],"class_list":["post-1227","post","type-post","status-publish","format-standard","hentry","category-4"],"_links":{"self":[{"href":"https:\/\/www.gaigaiming.com\/index.php\/wp-json\/wp\/v2\/posts\/1227","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.gaigaiming.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.gaigaiming.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.gaigaiming.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.gaigaiming.com\/index.php\/wp-json\/wp\/v2\/comments?post=1227"}],"version-history":[{"count":0,"href":"https:\/\/www.gaigaiming.com\/index.php\/wp-json\/wp\/v2\/posts\/1227\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.gaigaiming.com\/index.php\/wp-json\/wp\/v2\/media?parent=1227"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.gaigaiming.com\/index.php\/wp-json\/wp\/v2\/categories?post=1227"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.gaigaiming.com\/index.php\/wp-json\/wp\/v2\/tags?post=1227"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}