What color do orange and white make?
Orange and White make pink.

Orange and White make pink, #ffdfbf. That is the result in equal parts, mixing pigment rather than light - paint, ink and dye all behave this way.
Equal parts orange and white · #ffdfbf
Change the ratio
Very little of a mix is ever half and half. Shifting the balance moves the result along the range between the two colours.
3 parts orange, 1 part white · #ffb060
Equal parts · #ffdfbf
1 part orange, 3 parts white · #ffecd9
Lighter and darker
With white added - a tint · #ffecd9
With black added - a shade · #99734d
Why it works
Adding white to orange makes a tint. The hue does not change - only its lightness does, which is why you get pink rather than a different colour altogether. Keep adding white and it keeps moving towards plain white.
Frequently asked questions
What color do orange and white make?
Orange and White make pink, #ffdfbf. Mixed in equal parts that is the result you get with paint, ink or any other pigment.
How do I make the result lighter or darker?
Add white for a tint - here that gives beige. Add black for a shade, which gives grey. Add white a little at a time, because it takes far less than people expect to shift a mix.
What happens if I use more orange than white?
Three parts orange to one part white gives mustard. Reversing it to one part orange and three parts white gives beige instead.
Does this work the same way on a screen?
No. Screens mix light additively, so red and green light make yellow there. These results are subtractive - paint, ink, dye and pigment - which is what people mean when they ask what two colours make.