Changing the color of an SVG with CSS instead of creating multiple copies with different colors offers several benefits. Firstly, using CSS reduces file size, optimizing webpage loading times. Maintenance becomes more manageable, as color changes can be made globally in the CSS code. Also, consistency is maintained throughout the website design, as the same SVG can be reused.

So to do it all you need to do is add the SVG into the HTML and add "currentcolor" to the fill. After that, you can change the color freely in the CSS.

<svg width="124" height="24" xmlns="http://www.w3.org/2000/svg">
  <path
        d="M5.857 18.708c1.638 0 2.995-.36 4.07-1.08 1.075-.721 1.613-1.769 1.613-3.144-.083-1.855-1.464-3.246-4.144-4.173l-1.44-.597c-.314-.1-.538-.198-.67-.298a.45.45 0 01-.198-.373c0-.414.273-.62.819-.62.678 0 1.182.347 1.513 1.043l3.698-1.044c-.893-2.22-2.614-3.329-5.162-3.329-1.522 0-2.788.398-3.797 1.193C1.15 7.08.645 8.116.645 9.39c0 .398.058.766.174 1.106.116.34.29.638.521.894.232.257.455.48.67.671.215.19.488.369.82.534.33.166.582.286.756.36.174.075.41.162.707.261l.422.15 1.49.546c.363.133.6.244.707.335a.449.449 0 01.16.36c0 .431-.404.647-1.215.647-1.191 0-1.903-.53-2.134-1.59L0 14.509c.463 2.8 2.416 4.2 5.857 4.2zm11.636 0c1.638 0 2.845-.63 3.623-1.888v1.615h5.112V5.366h-5.112v7.156c0 1.474-.505 2.21-1.514 2.21-1.026 0-1.539-.736-1.539-2.21V5.366h-5.112v7.653c0 3.793 1.514 5.69 4.542 5.69zm16.103-.273V11.28c0-1.475.504-2.212 1.513-2.212 1.026 0 1.54.737 1.54 2.212v7.155h5.111v-7.652c0-3.793-1.513-5.69-4.541-5.69-1.638 0-2.846.63-3.623 1.888V5.366h-5.113v13.069h5.113zm15.383 0V11.28c0-1.475.504-2.212 1.514-2.212 1.025 0 1.538.737 1.538 2.212v7.155h5.113v-7.652c0-3.793-1.514-5.69-4.542-5.69-1.638 0-2.846.63-3.623 1.888V5.366h-5.113v13.069h5.113zM64.958 24l8.289-18.634H67.91l-2.532 6.684-2.258-6.684h-5.584l5.435 11.802L59.944 24h5.014zm13.67-5.292c1.638 0 2.995-.36 4.07-1.08 1.076-.721 1.614-1.769 1.614-3.144-.083-1.855-1.465-3.246-4.145-4.173l-1.44-.597c-.314-.1-.537-.198-.67-.298a.45.45 0 01-.198-.373c0-.414.273-.62.819-.62.678 0 1.183.347 1.514 1.043l3.698-1.044c-.894-2.22-2.614-3.329-5.162-3.329-1.522 0-2.788.398-3.797 1.193-1.01.795-1.514 1.83-1.514 3.105 0 .398.058.766.173 1.106.116.34.29.638.522.894.231.257.455.48.67.671.215.19.488.369.819.534.33.166.583.286.757.36.173.075.41.162.707.261l.422.15 1.489.546c.364.133.6.244.707.335a.449.449 0 01.161.36c0 .431-.405.647-1.216.647-1.19 0-1.902-.53-2.134-1.59l-3.723.844c.464 2.8 2.416 4.2 5.857 4.2zm9.8-14.137c.91 0 1.613-.215 2.11-.646.495-.43.744-.977.744-1.64 0-.678-.24-1.23-.72-1.651C90.082.21 89.371 0 88.428 0c-.943 0-1.655.211-2.135.634-.48.422-.72.973-.72 1.652 0 .662.249 1.209.745 1.64.497.43 1.2.645 2.11.645zm2.556 13.864V5.366H85.87v13.069h5.113zm7.74.273c1.737 0 2.977-.63 3.722-1.888v1.615h5.112V.472h-5.112v6.534c-.745-1.275-1.985-1.913-3.723-1.913-1.753 0-3.214.642-4.38 1.926-1.166 1.283-1.75 2.91-1.75 4.882 0 1.97.584 3.598 1.75 4.882 1.166 1.283 2.627 1.925 4.38 1.925zm1.39-3.9c-.729 0-1.312-.274-1.75-.82-.439-.547-.658-1.243-.658-2.087 0-.845.215-1.54.645-2.087.447-.547 1.034-.82 1.762-.82s1.311.273 1.75.82c.438.546.657 1.242.657 2.087 0 .844-.219 1.54-.657 2.087-.439.546-1.022.82-1.75.82zm16.698 3.9c2.597 0 4.624-.754 6.08-2.26l-2.11-2.833c-1.042.845-2.217 1.267-3.524 1.267-.992 0-1.799-.224-2.42-.67-.62-.448-.93-.879-.93-1.293h9.604c.083-.298.124-.687.124-1.167 0-2.054-.674-3.677-2.022-4.87-1.349-1.193-3.073-1.789-5.175-1.789-2.25 0-4.028.671-5.335 2.013-1.307 1.341-1.961 2.956-1.961 4.844 0 1.938.69 3.549 2.072 4.833 1.382 1.283 3.247 1.925 5.597 1.925zm2.208-8.149h-5.112c.033-.613.298-1.08.794-1.404.496-.323 1.084-.484 1.762-.484.678 0 1.266.165 1.762.497.497.331.761.795.794 1.391z"
        fill="currentcolor" fill-rule="nonzero" />
</svg>

svg {
  color: red;
}

Here are some use cases for changing SVG color with a bit of JS sorcery