No I don t think that s a good idea X11 Magenta is completely different from the meaning of magenta for centuries before I think the X11 guys needed a name for FF00FF and just picked magenta as the first thing they could think of I agree it s good to have a source but the X11 colors aren t a very good source for this IMO We could try converting 100 magenta ink color maybe like from some SWOP CMYK space to sRGB using ColorSync or some other CMM and then source that as the color for Magenta But really this is a reason that I don t like swatches for such articles Magenta doesn t refer to a particular color so much as a range of colors jacobolus t