Red and blue make the color purple, but for dark purple you would mix red and blue together and add a bit more blue than red to make it darker.
If you add another primary color to blue, it does make it darker or lighter, just a different color. Blue + Red = purple Blue + Yellow = green In order to make blue darker, you would need to add a darker color, like black (which is not a primary color).
Red and blue make the color purple. Red and dark blue would make a darker purple. If there is more blue it would be a cooler purple.
a little bit of black and a lot of blue
light/medium blue and black i would say
Dark purple.
red and blue colours make violet colour
Black ,dark blue,red.
Use blue mix it a tiny bit with red.
Dark blue and Dark red... or blue, red and black
purple
A dark purple
The colors Red and Blue, When mixed together make the color purple.Blue and red mixed together make Purple.
Dye it brown and dark red .
dark blue or red
dark colours such as black dark green dark blue dark red white
yellow, red & blue dark bown and white