Ahmed,

Welcome! I too am just starting on a 55.1 truck and I am really excited about it.

It looks like the exact color is not original. Something you might call "robin's egg blue"

If you are looking for something exact, here is a link to an awesome website dedicated to our era of vehicles. It has all of the factory paint options for the '54(also including the 55.1), It looks like Ocean Green might be the closest...

http://www.1954advance-design.com/AdvanceDesignTrucks/1954ColorsStripes.htm

I hope this helps,

Danny

1955.1 Chevy 5 window 3100
Instagram - @1955.1chevy