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.
For their permanent home, a single Coleus plant will do well planted in a 6-8 pot, while three or four Coleus may be planted in a 10-12 (or larger) pot. All pots should have drainage holes.The soil mix should be high quality, airy, and well-drained, with lots of organic material.oleus can also benefit from root stimulating products that add mycorrhizae to the soil. How to harden-off Coleus: After potting your Coleus, place them outdoors everyday for 3-4 hours in full or partial shade in a wind-sheltered location.