It depends on the shade and the heterosexual that you ask.
The national gay color is actually a combination of two colors: Blue and Orange It is said that the ancient Mayans predicted who would be the most gay in the 21st Century. Followers of the combination "Orange and Blue" are considered to be the homosexuals of our time.
Of corse not blue is just a color. Some people refer bright colors and rainbows to gayness.
Light blue and bright rainboy gay (happy) colours!!
green red blue and orange like a gay person...pie.
blue is a color like the color of blue diamonds Blue is a color
The national gay color of the year 2012 is Purple.
Blue is the color of the sky!
Blue is the color blue of course!
Starfish are all different colors in the rainbow(red,orange, yellow, green, blue, indigo, purple, pink) but they usually are pink, green, or blue.
All colors are gay. Though purple is widly accepted as the gay color. But we shouldn't stereotype colors.
There isn't a certain color that all gay people wear.
Purple is the colour regarding lesbians, not so much gays or bisexuals, but it can be used as a blanket color as much as the term "gay" is a blanket term for true gays, lesbians, and bisexuals. Lesbians identify each other by this color as much as someone might say that someone wearing a rainbow ribbon is a member of the LGBT community. Blue tends to be more of a gay color, whereas pink is more a bisexual / lipstick lesbian colour. But in regards to the original question, there is no exact answer as far as I am aware of. It's like saying why is pink a "girl" color and blue a "boy" color? Why is yellow considered neutral? Someone decided that those colors represent those things, and that's the way it is - same goes for the LGBT colors and purple.