For faraway shadows, Space blue will produce light, diffused tones. Ambient light in a landscape is an important element that helps set the tone. Since daylight is ever changing, its quality and direction suggests the time of day and the atmospheric conditions. For example, sunrise is brief with long, cool shadows and a sky that typically contains Ultramarine, Sky blue, and pastel colors. At midday, overhead lighting is stronger with an Ultramarine or Cobalt sky, and shadows are minimized but darker.
Clouds become white with a suggestion of warm gray shadow.
As sunset approaches, pale orange colors bathe the terrain in long, warm shadows that are tinged with purple. The sky once again darkens with a deeper blue that is laced with pastel streaks. At dusk, the sky appears quite bright against the darkened foreground horizon as all colors deepen. Night scenes can be illustrated in a variety of ways depending upon the amount of moon, star, or artificial lighting. The sky at the horizon should be a lighter Space blue and gradually fade to a darker Indigo or Prussian blue with stars dotted throughout.