achromatic color, achromatic colour - a color lacking hue; white or gray or black

alabaster - a very light white

bleach - the whiteness that results from removing the color from something; "a complete bleach usually requires several applications"

off-white, pearl, ivory, bone - a shade of white the color of bleached bones

chalk - a pure flat white with little reflectance

hoariness, frostiness - a silvery-white color