_content: fix ineffective font colors

This string expected the font color to be dark blue, but it didn't take effect.

Change-Id: I213ade6439da87d426f4ba5e20cb06f768da0bed
GitHub-Last-Rev: 9ecbb6e818b4ca976b6914a289c921a3fde8238d
GitHub-Pull-Request: golang/website#183
Reviewed-on: https://go-review.googlesource.com/c/website/+/431195
Reviewed-by: Michael Knyszek <mknyszek@google.com>
Reviewed-by: Michael Pratt <mpratt@google.com>
diff --git a/_content/lib/godoc/analysis/help.html b/_content/lib/godoc/analysis/help.html
index 8362a6c..c7ff78f 100644
--- a/_content/lib/godoc/analysis/help.html
+++ b/_content/lib/godoc/analysis/help.html
@@ -108,7 +108,7 @@
   code with <b>callers</b> and <b>callees</b> information: callers
   information is associated with the <code>func</code> keyword that
   declares a function, and callees information is associated with the
-  open paren '<span style="color: dark-blue"><code>(</code></span>' of
+  open paren '<span style="color: darkblue"><code>(</code></span>' of
   a function call.
 </p>
 <p>