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.
How to Grow Coleus. Many of the new coleus varities, such as Sunset Boulevard, feature warm colors. From the National Gardening Bureau. G ARDEN designers know that when it comes to annuals, it's not just about the flowers â foliage matters, too. And when it comes to foliage, coleus tops the list.verwintering coleus plants as houseplants is another way to get more plants. Temperatures near 70 degrees F. are required. Rotate plants and pinch back as needed to maintain form. Use grow lights to provide adequate light. By planting a single variety, such as Redhead, you can get dramatic effects.