I don't know why they went with Hex 500000 for the web maroon. It looks too dark and too brown to me. I always just match the Pantone CMYK for web graphics because it looks the way I think maroon should look.
Maybe they thought Hex 500000 was just easier to remember than Hex 600024. (although the actual web graphic they use for Pantone returns a match of Hex 5e0025)
Here's everything I have for the Pantone version:
[This message has been edited by Ryan the Temp (edited 6/23/2014 9:43p).]