red gray yellow purple
There is no standard order for mentioning colors except as to make the meaning of the sentence make sense and be clear. Alphabetical is ok, order of occurrence in whatever your subject is about is ok, the order of the spectrum is also ok if that makes sense in the sentence.
Red Yellow Blue Green Purple Black White Gray Orange Brown Pink Alphabetical Order: Black Blue Brown Gray Green Orange Pink Purple Red White Yellow
No, the colors are always in the same order.
In order for signs to be most effective, they need to have bright colors.
The colors of the rainbow in order are...RedOrangeYellowGreenBluePurple
Yes
I believe that the order of colors in the German flag is black(top), red(middle), and yellow(bottom).
The amount by which light is bent depends on its wavelength. The colors are arranged in the order of their wavelengths.
Alphabetical
There no significance to the colors of a menorah or the colors of the candles. It's just a matter of style and preference.
The colors are Green, white, and red in that order
you can order them in different colors, but they are usally grey or brown.