Red.
the coulor of ruby is red
Ruby is a shade of the colour red or pink.
A ruby is a rare precious stone of purplish red colour.
Deep red to burdgundy
Ruby - red
The gemstone commonly called ruby is red. The colour can vary from pale to very dark red. A Corundum -the technical name for ruby- of any other colour is called a sapphire.
The normal colour is a nice see through purple colour.
In books usual Gold.
Blue
Red, ruby.
red
The egg color of a Siberian Ruby-throated Hummingbird is white.