Snuff Brown. French ochre and Indian red added to zinc white will produce this color. Another way to produce a snuff color is to mix four parts of medium yellow and two parts of Vandyke brown, or burnt umber may be substituted for the Vandyke brown if desired. Another snuff color may be obtained by mixing burnt umber and yellow ochre, tinging with a little Venetian red. Scott-Shaw, C.R. "Rare and threatened plants of KwaZulu-Natal and neighbouring regions." KwaZulu-Natal Nature Conservation Service, Pietermaritzburg. 1999 Cobalt. This color is one of the best artist's colors, and cannot be successfully imitated. It is a beautiful and most useful color, but unfortunately it is expensive, and it is therefore used only in the finest work. French Green. This is a bright yellowish green, which may be obtained by adding to emerald or deep chrome green about one-tenth part chrome yellow. Yellow ochre is sometimes used instead. Implement Blue. This is made simply by mixing ultramarine with white. Barytes and zinc mixed are frequently used for the white, as lead cannot be employed in the presence of ultramarine.

Special need: Provide very good ventilation. Nearly all problems occur as a result of overwatering and poor ventilation, especially when weather conditions are dull and cool or very humid.Bircher, C., Prentice, C., Crouch, N. and Symmonds, R. "Conservation concerns for Bowiea volubilis, an unusually succulent member of the Hyacinthaceae." Herbertia 53:81-89. 1998 James Cullen, Sabina G. Knees, H. Suzanne Cubey “The European Garden Flora Flowering Plants: A Manual for the Identification of Plants Cultivated in Europe, Both Out-of-Doors and Under Glass” Cambridge University Press, 11/ago/2011

Alfred Byrd Graf “Hortica: a color cyclopedia of garden flora in all climates and indoor plants” Roehrs Co., 1992 Equal parts of white lead and oxide of zinc are ​frequently used as a white paint, although two parts of lead to one of zinc gives a better mixture. Gordon Cheers (Hrsg.) "Botanica: Das ABC der Pflanzen. 10.000 Arten in Text und Bild" Könemann Verlagsgesellschaft, 2003 Azure Blue. One part of ultramarine blue and forty ​parts of zinc white. Another shade may be obtained by mixing forty-four parts of white, twenty-nine of green and twenty-seven of blue. Or celestial blue and a little red on a base of white will give an azure shade. On the other hand, it is doubtful whether the mixture of lead and zinc is a good policy to follow. Many painters get excellent results by using white lead for the under coats and zinc white for the final coats.In the RYB color wheel, primary colors are colors that can’t be mixed from other colors. There are three primary colors: red, yellow, and blue.