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.
When you plant your coleus, water them until the soil is saturated. Avoid over-watering, as coleus can develop root rot and fungus diseases quickly in poorly drained soil. Make sure to fertilize just once a month with a balanced all purpose fertilizer, one of the 10-10-10 formulas.