Depending on the darkness of the grey you could create a chalky red moving towards a medium pink (A lighter grey mixed with the red) or with a darker grey added to the red you would create crimson or a deeper brown.
Red and blue.
Red is a primary colour. You can't make it with any other colour.
You would mix it with yellow, it's complimentary colour. Whenever you want to make the colour brown, just mix it with a complimentary colour. (Purple + Yellow, Red + Green, Orange + Blue.)
PURPLE or Black
When you mix pink and white you get a lighter pink and if you mix black with pink you get a darker pink.
gray
It Makes the Colour Orange
you can't mix red because red is a primary colour
pink
Gray dark gray white black red
Pink is red+white, whereas gray is black+white
You cannot mix grey with a single colour to form yellow. Yellow is made by mixing green and red. The addition of grey would render a dark shade of yellow.
When you mix gray with red, you will usually get a slightly toned down or muted version of red, depending on the proportion of each color. The resulting color may appear more subdued and have a blend of red and gray undertones.
If you mix yellow with red, you can make orange.
Maroon
purple
blue