nothing!
Light Orange
its called mixing
Considering that yellow is a primary color, there isn't a way to get true yellow without using yellow. You might try mixing brown and white or orange and white, but you won't get an actual yellow as more of a burned umber color.
pale orange
Pale orange
light orange
A lighter shade of orange than just red and yellow
Start with a little white, then add TINY drops of red & orange, then mix all of it up with a paint brush.
Tan
You get a salmon color.
Her favorite color is not orange. It is white
The color would literally be called a "grayed orange." Gray made of white and black doesn't actually change the color itself, it just fades the color out. The color will be duller. If you use a tinted gray the tint will affect the color. A gray with blue tint is described as blue, but has blue undertones. Mixing this with orange would result in a brownish gray version of the original orange. It would still be predominately described as orange.
Light Orange
Coral.
Light pink.
a lighter gray....
Pale blue