During my classes I think the question I get more often is the difference between transparent and opaque watercolors and which is which. I love to use transparent colours in my work I find the opaques to be a little dull in comparison. Here is a list I found online and it will help you in your paintings:
Aureolin, Gamboge Genuine, Indian Yellow, Rose Doré, Quinacridone Red, Permanent Alizarin Crimson, Permanent Carmine, Rose Madder Genuine, Quinacridone Magenta, Purple Madder, Permanent Magenta, Thioindigo Violet, Winsor Violet (Dioxazine), Ultramarine (Green Shade), Winsor Blue (Red Shade), Antwerp Blue, Prussian Blue, Viridian, Winsor Green (Yellow Shade), Hooker’s Green, Permanent Sap Green, Olive Green, Green Gold, Raw Sienna, Quinacridone Gold, Perylene Maroon, Burnt Umber, Gum Arabic.
The Most Opaque Colours
Using the most opaque colours gives flatter washes and greater covering over previous washes. Opaque colours are also useful for toning down colour mixtures. For even greater opacity, try combining some Designers’ Gouache colours into your technique.
Lemon Yellow (Nickel Titanate), Cadmium Yellows, Orange and Reds, Vermilion Hue, Winsor Emerald, Oxide of Chromium, Cobalt Green (Yellow Shade), Naples Yellow, Naples Yellow Deep, Light Red, Venetian Red, Indian Red, Caput Mortuum Violet, Sepia, Indigo, Neutral Tint, Blue Black, Ivory Black, Lamp Black, Titanium White. All tints made with white.