Mac OS X 10.4 uses colors when anti-aliasing text

I just installed the recently released Mac OS 10.4. Thankfully Lux appears to work without any problems. One thing that I immediately noticed was that all the text that gets drawn on the board looks different. I investigated further and have come to the conclusion that when OSX 10.4 anti-aliases text it uses colors, even if the text is black on a white background!

This isn't just for Lux though, the system does it everywhere. Here's are close-ups of the OSX menubar that show the difference between the 10.3 and 10.4 (close-ups provided by the lovely developer tools app Pixie):

Posted by dustin on May 1, 2005 with category tags of

2 comments
i find the text in Tiger to be crisper and generally more aesthetically pleasing, and I guess this helps somehow.

Aside from an extremely unstable Safari, the only problem I've had with Tiger so far has been that light text on a dark background looks really blobby and can be really hard to read.
   comment by Neale on May 1, 2005

OK, turns out that I was not 100% correct with my assessment. Apparently OSX has had the capability to do such colored anti-aliasing for a while now. You can control it by adjusting the 'Font smoothing style' in the Appearance system preference pane. The difference is that in 10.4 they have added a new setting (Automatic), which will be equivalent to Medium on LCD screens. This is why I'm seeing colors now. The Standard setting will give you gray anti-aliasing (and was the default setting of yore).

This correction brought to you by the always excellent John Gruber (aka Daring Fireball - get a cool T-shirt with a membership).
   comment by dustin (#1) on May 2, 2005

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