Merge pull request #494 from AaratiAkkapeddi/alt-text-in-dark-and-monochrome-mode

changes alt text color to black when both monochrome + dark mode enabled

Author: Qianqianye

styles/global.scss

@@ -508,6 +508,10 @@ input[type="search"]::-webkit-search-results-decoration {
   display: -webkit-box; // Needs webkit box to support line-clamp
 }
 
+.dark-theme.monochrome-theme .renderable-alt{
+  color: var(--type-black); 
+}
+
 .skip-to-main {
   position: absolute;
   left: -1000px;