Yellows, Blues and Reds.

Yellows

From left to right; Naples Yellow, Lemon Yellow, Primary Yellow and Yellow

°Tone –  Naples yellow is the lightest.

° Hue – Both Lemon Yellow and Yellow have a greenish hue.

°Chroma – Primary Yellow is the most intense yellow pigment.

Blues

Turquoise Blue, Cerulean Blue, Ultramarine Blue and Pthaleo Blue.

°Tone – Turquoise Blue is the lightest.

°Hue – Turquoise has green/yellow hues.  

          – Ultramarine Blue has a violet/red hue.

°Chroma –  Pthaleo Blue had the most intense blue pigment.

Reds

Vermillion, Naphthol Red, Quinacridone Red, Carmine, and Cadmium Red.

°Tone – Vermillion is the lightest, while Carmine is the darkest.

° Hue – Both Vermillion And Naphthol Red have yellow/orange hues.

°Chroma – Cadmium Red has the most intense of red pigment

Primary scales yielding secondary coloursYellow to red – secondary shades of orange.

Yellow to blue – secondary shades of green.

Red to blue – secondary shades of magenta.

                    – with the addition of white secondary shades of purple and violet.

Primary colours of equal tonal value yielding secondary colours

 

Red to blue became a muddied grey halfway through the scale.