Hi guys! I'm a brand new member and a very proud owner of a Fiesta!
Only had my Fiesta for 6 week or so, love it so much!
On the subject of LED colours, I voted RED, I've just ordered some for the footwells and can't wait to get them fitted. I like the White defaults that Ford fitted but I think red will match the rest of the dash and glovebox lighting strip.
I'm so glad to be aboard with all you guys for the ride! 
Welcome to FOC, enjoy your stay.
I've tried blue for a week,and have now resorted back to red.
Blue (in my opinion) looked a bit too bright and chav. Red is a nice glow, not to bright and fits in with my dials and radio etc
I changed to blue as the all-new focus was advertised with a cool ambient blue glow in the footwells, which (in my opinion) made bright red footwells look very chavy.
Each to their own I guess

I'll hang onto the blues and whites in case I fancya seasonal mood change or a bit of mix and match, lol 
Shame we can't just press a button to change the colour of the lighting like the US fiesta owners can:
http://www.flickr.co...157623957250302http://www.flickr.co...157623957250302http://www.flickr.co...157623957250302 - it even changes the colour of your bottled water! lol
Paul