No
Yes, they do have uniforms. but, their uniforms are white and green in color and traditional costumes.
Blue.
Blue
Union uniforms were blue; Confederate uniforms were gray.
Grey
whitish gray
Home uniforms were white with blue lettering and trim, road uniforms were gray with blue lettering and trim.
The color of WW2 RAF uniforms is actually the result of the weave of three colors of yarn, not an actual dyed color. This applies to both the serge wool used on the Other Ranks uniforms as well as for the barathea wool used in officer uniforms. SInce it's not a solid color, there is no particular dye color that will replicate it.
School Uniforms do have colour, even if they are blcak or grey or white, they are colours.
The Southern (Confederate) Army wore grey uniforms.
white and maroon