Help with colour change of username

[Mackeral_Fillet]

Hi all,

Apologies if this is a real basic one but I am pretty new to vBulletin.

I simply would like to change the text colour of the username under the thread title from the blue to black. Would anyone be so kind to tell me how I can do this, whilst retaining the link colour of everything else (just need to change the colour of the blue username under thread title, not on the right hand side).

Thanks very much.