这个答案是基于https://stackoverflow.com/a/24933495/3890888，但是使用了一个简单的JavaScript版本的脚本。

您需要将SVG设置为内联SVG。你可以使用这个脚本，通过添加类svg到图像:

/*
 * Replace all SVG images with inline SVG
 */
document.querySelectorAll('img.svg').forEach(function(img){
    var imgID = img.id;
    var imgClass = img.className;
    var imgURL = img.src;

    fetch(imgURL).then(function(response) {
        return response.text();
    }).then(function(text){

        var parser = new DOMParser();
        var xmlDoc = parser.parseFromString(text, "text/xml");

        // Get the SVG tag, ignore the rest
        var svg = xmlDoc.getElementsByTagName('svg')[0];

        // Add replaced image's ID to the new SVG
        if(typeof imgID !== 'undefined') {
            svg.setAttribute('id', imgID);
        }
        // Add replaced image's classes to the new SVG
        if(typeof imgClass !== 'undefined') {
            svg.setAttribute('class', imgClass+' replaced-svg');
        }

        // Remove any invalid XML tags as per http://validator.w3.org
        svg.removeAttribute('xmlns:a');

        // Check if the viewport is set, if the viewport is not set the SVG wont't scale.
        if(!svg.getAttribute('viewBox') && svg.getAttribute('height') && svg.getAttribute('width')) {
            svg.setAttribute('viewBox', '0 0 ' + svg.getAttribute('height') + ' ' + svg.getAttribute('width'))
        }

        // Replace image with new SVG
        img.parentNode.replaceChild(svg, img);

    });

});

然后，现在如果你这样做了:

.logo-img path {
  fill: #000;
}

或者可能是:

.logo-img path {
  background-color: #000;
}

JSFiddle: http://jsfiddle.net/erxu0dzz/1/

尝试纯CSS:

.logo-img {
  /* to black */
  filter: invert(1);
  /* or to blue */
  filter: invert(0.5) sepia(1) saturate(5) hue-rotate(175deg);
}

更多信息请参见本文https://blog.union.io/code/2017/08/10/img-svg-fill/

来自@Praveen的答案是可靠的。

我不能让它在我的工作中响应，所以我为它做了一个jquery悬停函数。

CSS

.svg path {
   transition:0.3s all !important;
}

JS / JQuery

// code from above wrapped into a function
replaceSVG();

// hover function
// hover over an element, and find the SVG that you want to change
$('.element').hover(function() {
    var el = $(this);
    var svg = el.find('svg path');
    svg.attr('fill', '#CCC');
}, function() {
    var el = $(this);
    var svg = el.find('svg path');
    svg.attr('fill', '#3A3A3A');
});

直接到svg填充css将不工作，你可以使用如下

<style>
svg path {
    fill: red;
}
</style>
<svg xmlns="http://www.w3.org/2000/svg" width="20.666" height="59.084" viewBox="0 0 20.666 59.084"><g transform="translate(-639.749 -3139)"><path d="M648.536,3173.876c0-2.875-1.725-3.8-3.471-3.8-1.683,0-3.49.9-3.49,3.8,0,3,1.786,3.8,3.49,3.8C646.811,3177.676,648.536,3176.769,648.536,3173.876Zm-3.471,2.341c-.883,0-1.437-.513-1.437-2.341,0-1.971.615-2.381,1.437-2.381.862,0,1.438.349,1.438,2.381,0,1.907-.616,2.339-1.438,2.339Z" fill="#142312"/><path d="M653.471,3170.076a1.565,1.565,0,0,0-1.416.9l-6.558,13.888h1.2a1.565,1.565,0,0,0,1.416-.9l6.559-13.887Z" fill="#142312"/><path d="M655.107,3177.263c-1.684,0-3.471.9-3.471,3.8,0,3,1.766,3.8,3.471,3.8,1.745,0,3.49-.9,3.49-3.8C658.6,3178.186,656.851,3177.263,655.107,3177.263Zm0,6.139c-.884,0-1.438-.514-1.438-2.34,0-1.972.617-2.381,1.438-2.381.862,0,1.437.349,1.437,2.381,0,1.909-.616,2.34-1.437,2.34Z" fill="#142312"/><path d="M656.263,3159.023l-1.49-14.063a1.35,1.35,0,0,0,.329-.293,1.319,1.319,0,0,0,.268-1.123l-.753-3.49a1.328,1.328,0,0,0-1.306-1.054h-6.448a1.336,1.336,0,0,0-1.311,1.068l-.71,3.493a1.344,1.344,0,0,0,.276,1.112,1.532,1.532,0,0,0,.283.262l-1.489,14.087c-1.7,1.727-4.153,4.871-4.153,8.638v28.924a1.339,1.339,0,0,0,1.168,1.49,1.357,1.357,0,0,0,.17.01h17.981a1.366,1.366,0,0,0,1.337-1.366v-29.059C660.414,3163.893,657.963,3160.749,656.263,3159.023Zm-8.307-17.349h4.274l.176.815H647.79Zm9.785,43.634v10.1H642.434v-17.253a4.728,4.728,0,0,1-2.028-4.284,4.661,4.661,0,0,1,2.028-4.215v-2c0-3.162,2.581-5.986,3.687-7.059a1.356,1.356,0,0,0,.4-.819l1.542-14.614H652.1l1.545,14.618a1.362,1.362,0,0,0,.4.819c1.109,1.072,3.688,3.9,3.688,7.059v9.153a5.457,5.457,0,0,1,0,8.5Z" fill="#142312"/></g></svg>

这对我很有效

如果你的目标只是改变logo的颜色，你不一定需要使用CSS，那么不要使用javascript或jquery，因为之前的一些回答建议。

要精确地回答最初的问题，只需:

在文本编辑器中打开logo.svg。 寻找fill: #fff并将其替换为fill: #000

例如，你的logo.svg在文本编辑器中打开时可能是这样的:

<svg fill="#000000" height="24" viewBox="0 0 24 24" width="24" xmlns="http://www.w3.org/2000/svg">
  <path d="M0 0h24v24H0z" fill="none"/>
  <path d="M1 21h22L12 2 1 21zm12-3h-2v-2h2v2zm0-4h-2v-4h2v4z" fill="#fff"/>
</svg>

．.． 只需更改填充并保存。

对于我来说，我的svg在使用img和svg时看起来有所不同。所以我的解决方案将img转换为csv，在内部更改样式并返回img(尽管它需要更多的工作)，我相信“blob”也有更好的兼容性比upvotes使用“掩码”的答案。

  let img = yourimgs[0];
  if (img.src.includes(".svg")) {
    var ajax = new XMLHttpRequest();
    ajax.open("GET", img.src, true);
    ajax.send();
    ajax.onload = function (e) {
     
      svg = e.target.responseText;

     
      svgText = "";
      //change your svg-string as youd like, for example
      // replacing the hex color between "{fill:" and ";"
      idx = svg.indexOf("{fill:");
      substr = svg.substr(idx + 6);
      str1 = svg.substr(0, idx + 6);
      str2 = substr.substr(substr.indexOf(";"));
      svgText = str1 + "#ff0000" + str2;
      

      let blob = new Blob([svgText], { type: "image/svg+xml" });
      let url = URL.createObjectURL(blob);
      let image = document.createElement("img");
      image.src = url;
      image.addEventListener("load", () => URL.revokeObjectURL(url), {
        once: true,
      });
      img.replaceWith(image);
    };
  }