BLUES
Prussian blue—A strong tinting blue, very dark with a greenish cast. Good for producing brilliant greens when combined with yellow.
Cobalt blue—A strong blue with a reddish cast. Good for mixing.
Cerulean blue—A strong blue with a greenish cast.
Ultramarine—Sometimes called French blue. It has a reddish cast and makes a beautiful purple when mixed with alizarin crimson.
Most poppies belong in the more formal garden but the particular species in this everlasting garden is both attractive in flower and effective blue red in pod. It's grown to produce seed for poppy-seed rolls and is called Papaver Rhoeas 'Hungarian Blue'. Papaver is an ancient Latin word said to be derived from the sound made when the seeds are chewed. The pods are at first covered with a bloom and are a beautiful blue-green, turning brown as they dry. They become their own seed shakers. Plants grow to 3 feet in height and will do well in a very dry but sunny spot. Flowers, if cut, should have their stem-ends seared over a flame. These poppies are hardy annuals.
Because Clerk Maxwell added red, green, and blue light together, this technique is called additive. An equal addition of the three colors forms white; red and green add to form yellow; red and blue, magenta; green and blue, the blue-green known by photographers as cyan. It is important to bear in mind that this theory holds true only for colored light; the mixture of pigments is another matter.