I was wondering since there are so many different shades of Blue , what do most of you use for a "boy baby shower"...I don't have many colors since I am still new so I would like to now..

I would use Sky Blue.

i use a minute amount of blue to get a light pastel blue color. for girls i use a really light pink. Baby cakes are always pastel to me. When the little one comes home from the hospital the color of their jammies is always a light blue or pink not a vivid color.

I use very little royal blue to get pale blue for baby boys.

edited to add: I use Wilton paste colors.

I too would use very little navy blue for baby blue. My first try, I used sky blue and it did not come out pastel, it was way too bright. Then I used navy blue and it was perfect.