I highly recommend making small color wheels using only three colors. Label them carefully with both the manufacturer and the name of the color.
Professional grade can differ greatly from student grade. A “hue” will contain more binder and less pigment. Manufacturers also differ significantly.
Looking at photos of color wheels is not the same as making your own. by making your own you will immediately understand the characteristics of the pigments, the transparency or opacity, the tinting strength and the tendency toward warm or cool. The mystery of mixing greens and purples will vanish. The little color wheels can be carried with you when you paint en plein air.
In The Color Scheme Game Workshops, I ask the students to bring one tube each of any red, yellow and blue watercolor. Each student makes one color wheel. We end up with a variety of pigments being used and a variety of oranges, purples and greens to compare with one another when the color wheels are completed.
The ideal limited palette includes a warm yellow, cool yellow, warm red, cool red, warm blue and cool blue. With those six pigments almost any color can be mixed, including all the beautiful neutrals. A few of my favorite colors that can’t be mixed are the cobalt violets and the turquoise blues. when travel space allows, I usually bring viridian and burnt sienna for convenience and economy. I can mix those two colors but it is more costly in time and money to do so.
I used the following colors to make the eight wheels shown above.
Aureolin (Winsor Newton) – cool yellow, transparent, professional grade
Gamboge Hue (Grumbacher) – warm yellow, slightly opaque, professional grade
Phthalo Blue (Sennelier Aquarelle Extra Fine) – cool blue, fairly transparent, professional grade
Ultramarine Blue (Cotman) – warm blue, slightly opaque, student grade
Carmine (Holbein) – cool red, transparent, professional grade
Cadmium Red Light (Grumbacher) – warm red, opaque, professional grade
At first glance the Aureolin and the Gamboge Hue might appear identical. However, their unique characteristics become apparent when mixed with other pigments.
Note that no matter what the proportions of cadmium red light to phthalo blue might be, one will never arrive at a purple, only variations (often beautiful) of browns and grays. There is too much yellow in both the cadmium red light and the phthalo blue. The yellow negates any purple that might be tempted to appear.
The following are the eight combinations possible with six pigments, a warm and cool of yellow, red and blue:
Warm yellow, warm red, warm blue
Warm yellow, warm red, cool blue
Warm yellow, cool red, warm blue
Warm yellow, cool red, cool blue
Cool yellow, warm red, warm blue
Cool yellow, warm red, cool blue
Cool yellow, cool red, warm blue
Cool yellow, cool red, cool blue
It’s worth the time to create the color wheels. Please believe me! Let me know, after making the wheels, if you agree.