The colors that are seen when sunlight is split by a prism are sometimes called the spectral colors. These are red, orange, yellow, green, blue, indigo, and violet. These ROYGBIV colors are often reduced to three red, green, and blue-violet which are the primary colors for the additive color system (light).
Growing coleus from seed. Coleus seedlings are abundant with varying shades of color from the moment they pop through the earth. Their vibrant colors are intensified when grown under fluorescent lights. An abundance of light is a must if you propagate coleus indoors in January.
Coleus are also quite striking when they are planted in a container and grown as a house plant. By removing the flower spikes as they develop, and keeping the plant pinched back, the Coleus can be kept growing as a perennial for several seasons. These plants are a member of the nettle family but they are also a mint.ookies! Coleus plants are durable and easy to grow. They are best known for their bright colors, and variety of foliage forms. Technically, they are a tender perennial but they are usually considered an annual plant by growers and seed producers.