There are no two colors that make red because red is a primary color. There are three primary colors: red, blue and yellow. Primary colors are used to create all other colors and classifications of colors either by mixing primary colors or by using the processes of tinting and darkening.
Mixing any two of the three primary colors creates either green, orange or violet; these colors are classified as secondary colors.
To lighten a color, use the technique of tinting: mixing white with a color to make it lighter. A tint of red is pink. To darken a color and enrich it, use the process of darkening. Darkening requires mixing black with a color. Maroon is a darker red.