+> Sure, I have a couple.
+>
+> The preprocess function is passed named parameters. The hack you have of
+> hardcoding use of `$_[0]` and `$_[2]` can fail at any time.
+>
+> `replace_preserved_style` is passed a single parameter, so its prototype
+> should be `($)`, not `(@)`. Ditt `preserve_style`, it should have
+> `($$)`.
+>
+> The sanitize hook is always passed `$params{content}`, so there should be
+> no reason to check that it exists. Also, it shouldn't be done in a
+> sanitize hook, since html sanitization could run _after_ that santize
+> hook. It should use a format hook.
+>
+> The preprocess hook needs to call `IkiWiki::preprocess` on the content
+> passed into it if you want to support nesting other preprocessor
+> directives inside the color directive. See `preprocess_toggleable` in the
+> toggle plugin, for example.
+>
+> I'm not a big fan of the dummy text `COLORS { ... } SROLOC;TEXT { ... TXET }`
+> The method used by toggle of using two real `<div>`s seems slightly
+> better. --[[Joey]]
+