feed: update profile name color

profile name in darkmode is lightgray but in lightbox was blue.

changed to lightgray for consistency.

src/styles/cards.css

@@ -69,7 +69,7 @@
 }
 
 .mbox-kind0-name {
-  color: var(--color);
+  color: var(--color-accent);
 }
 
 .mbox-updated-contact .mbox-body,

src/styles/main.css

@@ -42,7 +42,7 @@
 @media (prefers-color-scheme: light) {
   html {
     --color: rgb(93, 93, 93);
-    --color-accent: rgb(16, 93, 176);
+    --color-accent: rgb(130, 130, 130);
     --color-danger: #0e0e0e;
     --bgcolor: #fff;
     --bgcolor-nav: gainsboro;