Blue is a primary light colour so it exists all the time.
You cannot make it from any other colour.
Shine a bright white light through a prism or look at a rainbow, you can see the "blue" part of the visible spectrum.
Shine a light through a "blue" filter you can see the blue colour on a substrate.
Between 400 and 500 nano meters frequency is where blue can be found
The shades for the color blue are: turquoise, Antwerp blue, robin egg blue, sky blue, royal blue, sapphire blue, indigo, teal, navy blue, aqua, asul, azure, Alice blue, baby blue, blue, blue-green, bondi blue, Carolina blue, Chartre Blue, cerulean blue, cobalt blue, Columbia blue, cornflower blue, cyan, dark blue, denim, dodger blue, Egyptian blue, electric blue, han purple, international klein blue, Maya blue, medium blue, midnight blue, navy blue, pale blue, Persian blue, Persian indigo, powder blue, smalt blue, steel blue, ultramarine blue, united nations blue, air force blue, brandeis blue, duke blue, majorelle blue, Prussian blue, yale blue, pigment blue, blue bell, wild blue yonder, pacific blue, blizzard blue, ultra blue, blueberry blue, blue bird blue.
Brandeis blue Carolina blue Cerulean Cobalt blue Columbia blue Cornflower blue Dark blue Denim Dodger blue Duke blue Egyptian blue Electric blue Han blue Indigo Intl. Klein blue Light blue Majorelle blue Maya blue Midnight blue Navy blue Periwinkle Persian blue Powder blue Prussian blue Royal blue Sapphire Sky blue Steel blue Ultramarine Yale blue
Democrats are blue.
His favorite color was blue,.
Blue!
blue is called blue because somebody named it blue
It's blue. No doubt about it.
Names of blue, partial list.Here are some: turquoise, Antwerp, robin egg, sky, powder, royal, sapphire, indigo, teal, baby, navy, heather, peacock. I found some more:aqua, asul, azure, Alice blue, baby blue, blue, blue-green, bondi blue, Carolina blue, Chartre Blue, cerulean blue, cobalt blue, Columbia blue, cornflower blue, cyan, dark blue, denim, dodger blue, Egyptian blue, electric blue, han purple, international klein blue, Maya blue, medium blue, midnight blue, navy blue, pale blue, Persian blue, Persian indigo, powder blue, smalt blue, steel blue, ultramarine blue, united nations blue, air force blue, brandeis blue, duke blue, majorelle blue, Prussian blue, yale blue, pigment blue, blue bell, wild blue yonder, pacific blue, blizzard blue, ultra blue, blueberry blue, blue bird blue, icy blue, snowflake blue, stone blue, etc. Add more if you know any.Petty blue
I need to know
they are blue because they are blue and printed
blue
blue