Intro to Oil 1.2

First "color pass": a layer of warm and cools glazed over the grisaille, using ultramarine blue and burnt sienna mixtures, with plenty of medium.
First “color pass”: a layer of warm and cools glazed over the grisaille, using ultramarine blue and burnt sienna mixtures, with plenty of medium.

The next step in progressing with our black and white underpainting (grisaille) is to wait until the grisaille is dry to the touch, and then layer thinly (or “glaze”) a warm and cool “first color pass” overlay. This will effectively start to warm and cool the highlights as well as lighter warm areas, and all of the cool areas. We will be using ultramarine blue for the cools, and burnt siennas for the warms. You can see in the picture above that the whites, grays and darks are beginning to develop space.

To understand how to mix the nuances of these warm and cool colors, we must first create a color chart using our two colors:

Pure ultramarine blue on the left hand vertical row, and burnt sienna on the right.
Pure ultramarine blue on the left hand vertical row, and burnt sienna on the right.

The middle vertical row is a 50/50 mix of each color. We add white progressively to the rows as they go down towards the bottom, to form a consistent whitening of value. The 2nd outer vertical rows are @90/10 % of each color (90% will be either the ultra if it’s the closer color, or burnt sienna). The rows adjacent to the middle vertical will be 75/25%.

The wonderful grays and middle values will give you a lot of opportunities to work with light, middle and dark warm and cool colors for your color pass.

Next class we will complete the “2nd color pass” during class time.


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