Men can't do the same blue/green colour diferentation that women can, that's a known medical fact.
As for the eggs the geneitics of egg colour go on all three layers of the egg so you need to disect one to really know if the egg is blue or not. On the inside after you peel off the inner membrane the egg shell can be white, off white, pink, or blue. On the outside sand the egg with a fine grit sandpaper and look for the same colours and then there is the outer layer which can be brown, or not anything at all if the egg never changed with the sanding.
The colour your eye perceives is due to the strength of each layer, if the layers show through, and even the lighting. Cooking alters some pigment so you have to do this with an egg raw. the genetics for each layer are seperate and yes the rooster controls the middle layer which is very important to egg colour as we see it.
As for the eggs the geneitics of egg colour go on all three layers of the egg so you need to disect one to really know if the egg is blue or not. On the inside after you peel off the inner membrane the egg shell can be white, off white, pink, or blue. On the outside sand the egg with a fine grit sandpaper and look for the same colours and then there is the outer layer which can be brown, or not anything at all if the egg never changed with the sanding.
The colour your eye perceives is due to the strength of each layer, if the layers show through, and even the lighting. Cooking alters some pigment so you have to do this with an egg raw. the genetics for each layer are seperate and yes the rooster controls the middle layer which is very important to egg colour as we see it.