The grass is the darkest and coolest light shape and therefor a reddish orange. the house in shadow is the lightest shadow shape and gets underpainted a medium blue-purple. the sky is coolish so i did it in the right value of magenta (pink actually). the shadow under the cottage is the darkest and coolest and i painted it dark purple.
after this is put on thin using lots of Liquin, i go back over all these shapes with a color that more closely represents the actual thing youre looking at. work on the shapes that are the most out of whack first. on the last pass you fix the edges, values, hues, and saturation.
alot of students ask me "how do you know when to stop?".
thats easy! you stop the minute youre not making big improvements to the painting that please you.