Thanks for all the advice,

Lovat blue goes well with the Muir tartan(my avatar)
I'll try it with the navy X-marks tonight

When wearing your Xmarks t-shirt with either kilt/tartan, you can wear the cream color hose. Maybe add a splash of color with flashes
I'll also give the oatmeal with lovat blue flashes a try

avoid white/cream hose at all costs or it might be thought that you're off to a wedding straight from work!!
Thanks fgor the tip Hamish I wasn't aware of that