yes it is a color, although people could call it anything from ocean blue to space blue,
Ultramarine is deep blue; blue color is redundant.
deep blue
It is a light blue
"Anil" dyes are deep blue.
There are many different shades of the color blue. Egyptian blue, dark blue, navy blue, midnight blue, and Catalina blue are deep blue colors.
indigo
Indigo can be described as a deep blue/purple color, similar to the color, blue-violet.
It is a deep indigo/violet blue. A brand-new pair of jeans is about that color.
Take a tone of blue and keep adding black to it till obtaining the desired tone of deep blue color.
Deep Blue
loil
It is known as deep electric blue.