I've just finished base support for the <color-profile> element and
for the 'color-profile' attribute on <image> elements.
Among other things, this means that Inkscape in SVN now passes the
W3C's compliance test on this (color-prof-01-f).
It's currently off by default. To turn it on, one needs to configure
Give it a spin and see what needs improving. I'm moving on to working
on support for fills like "#FF00FF icc-color(base, 0.0, 1.0, 0.0,
0.3)", then on to some named color support.