SWELLのSNSにBlueskyアイコンを加える方法について書きます。使用していないアイコンを利用して擬似要素で置き換えています。
例として楽天ROOMのアイコンをBlueskyに置き換えています。
CSS
.icon-room:before {
content: "";
display: block;
background-color: #fff;
width: auto;
height: 1em;
-webkit-mask-image: url("data:image/svg+xml,%3Csvg width='600' height='530' version='1.1' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='m135.72 44.03c66.496 49.921 138.02 151.14 164.28 205.46 26.262-54.316 97.782-155.54 164.28-205.46 47.98-36.021 125.72-63.892 125.72 24.795 0 17.712-10.155 148.79-16.111 170.07-20.703 73.984-96.144 92.854-163.25 81.433 117.3 19.964 147.14 86.092 82.697 152.22-122.39 125.59-175.91-31.511-189.63-71.766-2.514-7.3797-3.6904-10.832-3.7077-7.8964-0.0174-2.9357-1.1937 0.51669-3.7077 7.8964-13.714 40.255-67.233 197.36-189.63 71.766-64.444-66.128-34.605-132.26 82.697-152.22-67.108 11.421-142.55-7.4491-163.25-81.433-5.9562-21.282-16.111-152.36-16.111-170.07 0-88.687 77.742-60.816 125.72-24.795z' fill='%231185fe'/%3E%3C/svg%3E");
mask-image: url("data:image/svg+xml,%3Csvg width='600' height='530' version='1.1' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='m135.72 44.03c66.496 49.921 138.02 151.14 164.28 205.46 26.262-54.316 97.782-155.54 164.28-205.46 47.98-36.021 125.72-63.892 125.72 24.795 0 17.712-10.155 148.79-16.111 170.07-20.703 73.984-96.144 92.854-163.25 81.433 117.3 19.964 147.14 86.092 82.697 152.22-122.39 125.59-175.91-31.511-189.63-71.766-2.514-7.3797-3.6904-10.832-3.7077-7.8964-0.0174-2.9357-1.1937 0.51669-3.7077 7.8964-13.714 40.255-67.233 197.36-189.63 71.766-64.444-66.128-34.605-132.26 82.697-152.22-67.108 11.421-142.55-7.4491-163.25-81.433-5.9562-21.282-16.111-152.36-16.111-170.07 0-88.687 77.742-60.816 125.72-24.795z' fill='%231185fe'/%3E%3C/svg%3E");
-webkit-mask-repeat: no-repeat;
mask-repeat: no-repeat;
-webkit-mask-position: center;
mask-position: center;
-webkit-mask-size: 1em;
mask-size: 1em;
}