Some of you have expressed interest in working in another medium so h ere is some information about that
No matter what your choice of medium, color theory is always constant and works for them all.
The same ground pigments are used to make every medium. If a color is transparent in watercolor it is also transparent in oils, although your technique may alter this.
Each medium has different characteristics which you will need to explore as an artist. For example, watercolors dry lighter than they look when they are wet. Acrylic paint dries darker. The best way to discover what will work for you is to play with your medium. Try different things and then write down the results. I know, maybe you're an artist, not a writer. But it doesn't have to be anything more than the medium, the color and the manufacturer. Try to collect as many of these little experiments as possible. It doesn't have to take a great deal of time - if you've got your 'stuff' out, just do a quick experimentation, label and file.
Writing down these things will give you the following information:
The medium will tell you what worked and what didn't. Also if you really liked how it went on and what the effect was.
The color will remind you how you exactly achieved the one on the card. Was it straight from the tube? or did you mix it yourself?
Finally the manufacturer: Each color has a ASTM color-index name such as Ultramarine Blue pigment is PB29. But every Ultramarine Blue may not look or behave exactly the same way. Some manufacturers lower the cost by extending pigments which also lowers the paint quality. These may work for your style but if you would like a fully saturated color you may have to try one of the more costly brands.
And don't forget, manufacturers are always bringing out new 'stuff'. Be open to experimenting with these. Catalogues and art stores are usually very generous in introducing these newer materials so you can get a tube or crayon to try. And remember that the more you use your brush, the more you experiment and think through what seems to be difficult, the more you will grow and the higher level your skills will become.