Blue shading refers to the addition of color, usually blue, to a drawing or image to create a darker or more shadowed area. It helps to give depth or perspective to the artwork. Full definition
I haven't played with blue shades in so long but you're inspiring me to! (stylelullaby.com)
So you have noticed me wearing a pair of blue shades in some of my posts. (nightchayde.com)
Definitely one of my favorite designs to wear as it is so flattering for my petite frame and I adore the serene contrast of the lovely blue shades on the pure white dress. (prudencepetitestyle.com)