you can't, grey is a shade not a colour
Beige, rust, forest green, gray, and calico are colors. They are not primary colors, however. And, calico is a kaleidoscope of colors.
Let's deal with a complete question. What are black, white and gray? Black is the absence of all color. White is the presence of all colors in equal amounts. Gray is made up in many ways. Each primary color and its opposite, black and white, or the combination of primary or secondary colors can make variations of gray.
None--- Gray is a value, not a color/hue.
Red, blue, and yellow are primary colors because all other colors can be created from them in different mixtures and with neutrals, such as black, white, and gray. These are the only colors that cannot be made from a mixture of other colors.
the primary colors are red, blue, and yellow
Because you can create all the other colours using different combinations of the primary
Their primary color is Blue, but they might wear black, gray, and white also.
Red, green, blue.
For paints the primary colors are Red, Blue and Yellow. To achieve the secondary colors you mix 2 of the primary colors in equal amounts: Red + Blue = Purple Red + Yellow = Orange Blue + Yellow = Green
Grey? do you mean why did they wear grey? Brown and black were the primary colors of clothing in this time and no grey.
Mixing all three of the primary color pigments in equal measure, results in grey.
primary colors are red, blue, yellow. these are the three starter pigments and can't be created using any other combination of colors, hence the term primary.