Thursday, 8 June 2017

Understanding Colour – Pick your Purple

In the last post, you saw a chart of different blues. These blues were mixed with their complementary colours creating different greys. This week we will use those same blues and experiment with mixing six different reds. Primary colours blue and red = purple. The resulting purple is dependent on the blue and red mixed. One of the reds in this list – Light Red – a student grade paint from Winsor & Newton (Cotman) is more of a brick/brown red and in most cases, did not make a good purple.

The proportion of blue to red will affect the purple obtained. The purples obtained by mixing the blues with Rose Violet by Holbein is more luscious and the mixes using the Light Red appear to be more grayed down with the blue was more dominant in the mix.




The colours used are:
Blues
Brand Name
Reds
Brand Name
French Ultramarine Blue
Winsor &Newton
Permanent Rose
Da Vinci
Ultramarine Blue
Da Vinci
Rose Violet
Holbein
Phthalo Blue
Da Vinci
Rose Madder
Academy
Thalo Blue
Academy
Light Red
Cotman
Phthalo Blue
Cotman
Alizarin Crimson
Academy
Phthalo Turquoise
Da Vinci
Scarlet Late
Holbein
Turquoise
Academy


Cobalt Blue
Cotman


Cerulean Blue
Holbein


Indanthrene Blue
Da Vinci


Indigo
Winsor & Newton





Chris 

Thursday, 25 May 2017

Understanding Colour – Blue is Blue, Right?

Blue is one of the most common hues used in a painting. How do you know if you are choosing the “right” blue for your painting? How will the blue react if mixed with another colour?

What blues do you have in your paint box?


I have 11 blues – 2 Ultramarine (2 different manufacturers), 3 Phthalo (Thalo) blues (3 different manufacturers), and 2 Turquoise (2 different manufacturers) along with Cobalt, Cerulean, Indanthrene and Indigo. Winsor & Newton Cotman is their student grade and Academy is Grumbacher’s student grade paint.

You can see how they are different from each other. Even the same “blues” are different from the various manufacturers in the chart below.



I also did a value study of the Cerulean Blue.

 











In my last UnderstandingColour post, I discussed Complimentary Colours. The compliment of blue is orange. I created a chart using three colours which fit into “orange” – Burnt Sienna, Cadmium Orange and Cadmium Red Medium. I mixed each of the blues with each of the oranges. If you do this exercise with the blues in you paint box be sure to keep your brush and water clean so that they don’t contaminate other mixes. You can see how you can get a wide range of colours.

Give it a try and see what your blues will do.


Chris