Signals solid in the orange of the Signals icon's point (#268)

--accent2 mixed a quarter into the ground came out salmon, and is pink
or blue in other themes. Each Signal's tile is now solid #ff6a1a, or
#ff5500 in light, the point of signals.svg and signals-dark.svg, in
every theme as the icon is, with the icon or initials in the logo's
navy (#0c2238, 5:1 or better on either).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

docs/signals.md

@@ -20,7 +20,7 @@ their Signals that has not heard about the item yet.
   the set the page's own icons come from: 2,883 icons, solid, regular and brands, searched by name
   and Font Awesome's search terms ("ai" finds the robot). Without one, a Signal shows its initials.
   **Auto** asks Jev to choose (#263), and a Signal made without an icon gets Jev's pick by
-  itself, a moment after it is made. Every Signal's tile is in the needle's colour (`--accent2`), the orange point of the folder's icon.
+  itself, a moment after it is made. Every Signal's tile is solid in the orange of the folder icon's point.
 - **Each Signal's row** says "12 items · 3 unread", as a feed's row counts its own.
 - **The folder's page** lists the Signals, as an OPML's page lists its feeds, with the + for a new one.
 - **A Signal's page** is an ordinary item list: All, Unread, Downloaded and Pinned, search and sort.