font-weight: 600 and font-weight: bold

font-weight: 600 and font-weight: bold are not equivalent. The browsers stretch up their fonts when you use 600. For a really correct bold font you must use bold or 700.

Mozilla exhibits a similar bug only on Mac: any text with font-weight: 600 appears as normal, non-bold text.

Test page. Workaround is included.
Reported by ppk.

Explorer 5-6 Windows, Mozilla, Opera | Reported on 17 November 2004.

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1 Posted by Nick Fitzsimons on 13 October 2005 | Permalink

This is correct according to the CSS specs: "The keyword 'normal' is synonymous with '400', and 'bold' is synonymous with '700'."

CSS 1:

CSS 2:

2 Posted by David Storey on 14 October 2007 | Permalink

This is now fixed in Opera (at least to my eyes)