http://www.wowhead.com/item=45502#. <-- If you don't mind the brownish bits. It's not the 'loud' gold so to say but...
http://www.wowhead.com/item=40428#. <--- If you want blue and a very non-looking paladin helm. I don't like the navy but it's very settle.
http://www.wowhead.com/item=51266 <--- Sanctified Lightsworn. The blue is dark once more, sorry about that. ><
http://www.wowhead.com/item=46028#. <--- Silver and light blue. Not too sure about this one but hey.
http://www.wowhead.com/item=50311 <--- Second Helm of the Executioner. Lots of silver and blue.
http://www.wowhead.com/item=40933 <--- PVP helm
http://www.wowhead.com/item=16854 <--- T1 helm
http://www.wowhead.com/item=12427 <--- A classy helm. Imperial Plate Helm
http://www.wowhead.com/item=34401 <-- White/gold Sunwell helm
Hehe. Some of this stuff isn't soloable. We're kinda screwed though on plate. We...do not have much in the way of helms because we start off plate at level 40ish. Also. You want a sword, mace, or axe for your one hander?