There are four principles to suggest fog in a painting or drawing. As you move from the foreground to the background, lighten the value, narrow the contrast, desaturate the color, and show less detail. Lets see how these principles apply in a simple painting. Click on the first image to start a step by step slide show.

Mix a light gray by combining some dark blue and brown from your palette. Try Burnt Sienna and Ultramarine Blue. You could also use gray paint. Try Daniel Smith’s Black Tourmaline Genuine for a nice soft mouse gray. Be sure to test your colors off on the side of the paper before applying paint directly to your landscape.