<div>
  <h2>原图标</h2>
  <span class="icon icon-bike"></span>
  <span class="icon icon-bell"></span>
  <span class="icon icon-arrow"></span>
  
</div>

<div>
  <h2>更换成纯色图标</h2>
  <span class="icon icon-bike"></span>
  <span class="icon icon-bell"></span>
  <span class="icon icon-arrow"></span>
  
</div>

<div>
  <h2>更换为彩色图标</h2>
  <span class="icon icon-bike"></span>
  <span class="icon icon-bell"></span>
  <span class="icon icon-arrow"></span>
  
</div>

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  width: 100vw;
  height: 100vh;
  padding: 10px;
  background:radial-gradient(circle at 50% 60%, rgb(68, 78, 101), rgba(68, 78, 101, 0) 50%), radial-gradient(circle at 10% 10%, rgb(42, 72, 76), rgba(42, 72, 76, 0) 50%), radial-gradient(circle at 90% 10%, rgb(52, 25, 109), rgba(52, 25, 109, 0) 50%), radial-gradient(circle at 90% 90%, rgb(65, 104, 105), rgba(65, 104, 105, 0) 50%), radial-gradient(circle at 10% 90%, rgb(81, 49, 130), rgba(81, 49, 130, 0) 50%);
  color: #fff;
  text-shadow: 1px 1px 1px rgba(0,0,0,.5);
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(30vw, 1fr));
  gap: 20px;
  align-items: flex-start;
}

.icon-bike {
  mask: url(https://s3-us-west-2.amazonaws.com/s.cdpn.io/3/icon-bike-black.svg);
}
.icon-bell {
  mask: url(https://s3-us-west-2.amazonaws.com/s.cdpn.io/3/icon-bell-black.svg);
}
.icon-arrow {
  mask: url(https://s3-us-west-2.amazonaws.com/s.cdpn.io/3/icon-arrow-black.svg);
}
.icon {
  display: inline-block;
  width: 70px;
  height: 70px;
  background: black;
  mask-size: cover;
}

h2 {
  margin-bottom: 2vh;
}

div {
  text-align: center;
}

div:nth-child(2) .icon {
  background-color: red;
}

div:nth-child(3) .icon {
  background-color: #f36;
  background-image: linear-gradient(to right, #f90, #389, #d90);
}