I think the color of the laser is blue
You use white and blue.
green and blue.
Blue
blue
Blue
You can't mix two colors to get blue, but you can use blue and white to get light shades of blue and black to get dark shades.
you can use a color closer to the blue. i mean like violet, this will be more appropriate as eyeshadow are use to improve the eye appearance than the hair.
Blue
Blue
Light blue
it makes sea blue, makes sky blue, it is the only color which reflects