This expression means real and simple.
This is not an idiom - it means exactly what it says. When you see the words AS ___ AS ___ then you are dealing with A Simile - this one is comparing something white to the white color of a sheep.
A white elephant means 'something useless and expensive to keep'
When something is in black or white the meaning is that it is the truth.
Perhaps: Clearly defined; mutually exclusive
there are three colors on Iraqi flag white black and red and the takber (arabi expression meaning "God is great" in green Arabic script is centered in the white band : the black color represent oppression and red stand of bloody struggle the white color represent a bright future ....
Black & white butterflies do not have a specific meaning as omens. If however you see them in dreams they may have meaning. That meaning will have to do with other things happening in and around the dream.
black and white panda
white people still had the expression that black people were different from them. And some who did agree spread rumors about their skin color and facts that were UN true which gave bad expression about black people.
I do because its easier to shade The light and shade adds depth and expression.
siah o sufaid
A mixing of races; amalgamation, as by intermarriage of black and white.
Very probable is normal.