Colour Watch's fastext label, not just its swatch

Swatch-only blue read as unfinished next to the other five fully-
coloured entries. The word now carries the colour like every other
key, same currentColor mechanism as the rest — accepting blue's
~2.4:1 contrast on black as a known, deliberate exception to the
4.5:1 bar everything else here clears.

app.py

@@ -1304,25 +1304,20 @@ def service_urls():
 
 
 # Every destination, for the top of every page but the index, each
-# with its own distinct treatment. Order matches nav_items. The
-# locked eight teletext colours only give five that read as full-
-# saturation text on black (blue fails contrast there), so getting all
-# eight distinct without inventing a ninth colour takes three
-# treatments, not one:
-#   - Five flat colours, text and swatch both: the four with a real
-#     keyboard shortcut (r/g/y/c), plus magenta for Requests — not
-#     arbitrary, it's the same --pending magenta a request already
-#     shows once approved elsewhere, and Requests IS "waiting on a
-#     human".
-#   - Blue as a swatch-only accent (Watch): legible as a small solid
-#     cell — "the physical coloured button on the remote" — but not as
-#     the row's own text colour, where it fails contrast.
-#   - An ordered dither swatch (Activity): the one other legal way to
-#     get a distinct mark out of this palette per base.css's own first
-#     discipline, without smuggling in a ninth hue.
-# Settings keeps plain ink deliberately — the one purely administrative
-# destination with no live status of its own, so it's the one page
-# that gets no colour at all rather than an arbitrary last one.
+# with its own distinct treatment. Order matches nav_items. Six of the
+# eight get a flat colour, text and swatch both: the four with a real
+# keyboard shortcut (r/g/y/c), plus magenta for Requests (the same
+# --pending magenta a request already shows once approved elsewhere —
+# Requests IS "waiting on a human") and blue for Watch. Blue is ~2.4:1
+# contrast on black, well under the 4.5:1 every other body text here
+# clears — a known, deliberate exception, not an oversight; it's set
+# this way because coloured-icon-only for Watch read as unfinished
+# next to six fully-coloured neighbours. Activity gets an ordered
+# dither swatch instead of a flat colour, the one other legal way to
+# get a distinct mark out of this palette without smuggling in a ninth
+# hue. Settings alone keeps plain ink — deliberately, as the one page
+# with no live status of its own, so it's the one that gets no colour
+# rather than an arbitrary leftover.
 FULL_FASTEXT = [
     ("k-red",     "r", "100", "Index",    "/"),
     ("k-blue",    "",  "101", "Watch",    "/watch"),