January 12, 2021
Orange and Blue is a very versatile colour combination producing vivid contrasts and yet in mixes some lovely muted colours and greys can be made. In theory you should be able to mix a neutral grey if the orange and blue are mixed in the right proportions. Try this with an ultramarine and a cadmium orange. The exercise below used gouache pigments but could be done with watercolour or acrylic.
Try adding a titanium white to one of the darkest mixes. That will soon reveal whether the mix has a blue or an orange bias. See below.
Last week we saw how different hues looked when the same hue was surrounded by hues that were different in tone and saturation. This week we are throwing a much greater colour difference into the mix and the effects of pale and dark borders. The following were constructed digitally but the same principles apply when you are painting.
Outlines matter: the arrangement of colour is identical in the three illustrations below, they differ only in that the first group have no outline, the second group a black outline and the third group a white otline to the cross shapes.
References for this week can be found on the Power of Colour Pinterest board at:
The first challenge is to create two or three small studies that show how blue and orange can relate to each other, much as we did for the different blue hues. This time I would like to see both studies use similar shapes; these can be organic or more geometric. The colours should be distinct and either have no border, a black border or a white border. Use only one blue and a premixed orange e.g. cadmium orange or a similar bright orange.
Some people really enjoy making these studies/little abstract paintings. If you do, you may like to spend all your time on this. If not just spend a short time mixing colours; especially noticing any differences between mixing the complementary colours together, and mixing each complementary with white or black before spending most of your time on a painting; see notes below the study notes..
First Study; work with your chosen blue and orange as the brightest blocks of colour you can make. Include white as pure white and black as pure black and include shapes with and without outlines.
Second Study: In the second study try including some desaturated colour by mixing your blue with the orange. You may use white but not black.
(if time)Third Study: This time you may still use only one orange and one blue but do not mix them with each other, just use white or black to de-saturate the colours. You may choose whether to include any areas of pure blue and pure orange or you may choose to work with either very pale or very dark colour mixes.
Medium: You may use any medium for this; collage would work brilliantly perhaps inspired by works by Patrick Heron or Josef Albers. An opaque medium like gouache would also work well. This can also be done with watercolour, pastel or acrylic. These studies can be quite small and contain only about eight shapes, certainly not more than about twelve. If you decide to work in collage; paint some pieces of cartridge paper and cut or tare them to make your shapes. White paper can be your pure white and if you have any black paper that can be your black.
Painting; after the studies spend some time looking at the Pinterest Board again and make your own composition using any of your blue pigments, black and white but use only one premixed orange. Mix these however you like. An opaque orange like Cadmium Orange would be ideal but any bright orange will do.
Note how black lines can separate areas of colour, containing them as in a stained glass window. We often prepare to paint by drawing with lines that separate areas we may later choose to fill with colour. These lines usually represent edges of what we can see. Very often we obliterate these lines during the course of painting so that one colour lies directly against its neighbouring colour with no dividing line. See how in some works the artist uses line, sometimes to separate blocks of colour and/or to define the edges of objects within an area of colour as in the blue and gold interior painted by Matisse referenced on the Pinterest board for this week.
When looking at paintings look for works that use line and those that represent forms with no line which is much more as we see them.
Look at how Modigliani sometimes used a pale blue for eyes in a rather orange face. You might consider working from a black and white portrait photo. In landscape paintings blues tend to recede and the orange and red colours seem to advance. Whether you produce an abstract or a representational piece think about edges and enjoy the colour!
January 5, 2021
For the next few weeks we’ll be looking at primary colours used on their own and their use with each of their complementary colours. Primary colours will also be used with closely related hues to make harmonious compositions.
We’ll also explore some of the effects of colours on each other, after all colour can seriously affect your eyes or at the least deceive them a little!
Look at the appearance of the four blue squares on the right and middle columns above. Do they look different? What happens at their edges?
Then: stare at each of the squares in turn for about a minute then look at the blank space below before going on to the next one. What do you see?
For even more spectacular after images stare at the colour wheel below and then at a white space. these after images and illusions are with us all the time we are seeing.
To start with, here are a few basic definitions that are relevant to the course.: please skip if you are already up to speed with this!
Hue: a pure colour of a certain wavelength in the visible light spectrum.
Colour wheel; this should be a circle with a continuum of all the different hues in the visible spectrum. In practical terms this has been reduced to a beach ball of just six colours which represent six major groups of colour as used for painting; firstly, the three primary colours; red, yellow, and blue called primaries because they cannot be mixed from other colours; secondly, the three secondary colours orange, green and purple which can be mixed from the primary colours and which lie in between the colours they are mixed from on the colour wheel. Scientists and artists have invented a huge number of colour wheels, some of which include many more colours and also tints and shades at different levels within the circle.
Analogous colours; colours close in hue and next to each other on the colour wheel. the colour wheel. e.g. red and a reddish purple
Saturation : the purity of the colour, which is occasionally and I think confusingly, called intensity. To de-saturate a colour mix the pure hue (fully saturated colour), with its complementary colour, or black or white. The saturation of some colours is altered radically by even the smallest amounts of these; for example yellow is very rapidly changed by the addition of the smallest amounts of purple or black.
Tone: how light or dark a colour appears. Every pure hue has an intrinsic tone. A pure yellow for instance is always paler than a pure red. The additionof black, both de-saturates a hue and lowers or darkens its tone. Colours darkened in this way are usually called shades. The addition of a complementary colour also lowers its tone.
The addition of white to a hue lightens it and is said to raise its tone to make tints.
The definition of tints and shades is not always consistent as pastels are often labelled as e.g. tints 1 to 6 where usually a stick labelled tint 1 or 0 is the palest and is the pure colour plus white, and a stick labelled tint 6 is the darkest of that colour made up of the pure hue plus black.
This week’s colour is blue. Often the colour of melancholy and depression as in Picasso’s blue period portraits, I didn’t choose blue first because of Covid creating so much depression this New Year. No, I chose it first because it’s also the colour of sunny skies and Mediterranean waters, and because as you will see next week blue is great to combine with its complementary orange.
The blue pigments I have used for the exercises are
French Ultramarine (warm),
Cobalt Blue (warm)
Phthalo Blue, green shade or Prussian blue (cold)
It’s useful to have at least one warm and one cool blue to work with. If I had only two I would probably favour Ultramarine and Cerulean, but the richness of cobalt and the dark tones that can be produced with Phthalo or Prussian Blues are very useful additions.
For this week you will also need a black and white, and perhaps a couple of analogous colours a blueish purple and a blueish green or turquoise.
Used at full strength pure cobalt and pure cerulean are not as dark in tone as Ultramarine or Phthalo Blue and the darkest is Prussian blue. Phthalo Blue, Prussian blue and Ultramarine are generally more transparent than Cerulean and cobalt blue.
What does this mean in practice?
Transparency only applies to watercolour, oil and acrylic paints as if you are using gouache or pastel you are effectively working with an inherently opaque medium. Transparent colours deepen the more layers of colour that are added. Opaque colours laid down at full strength do not become darker when further layers are added. Very often it is difficult unless you know their position to identify the transparent colours of watercolour pans in a box because they all appear so dark whereas the more opaque colours give away their identity on sight; e.g, cadmium red, cadmium orange etc.
Exercises; I have chosen watercolour for this week but most could be done with pastel, acrylic or gouache. I hope to provide some pastel examples later in the week. The illustrations are only to give you ideas of ways to explore the blue pigments in your own boxes,
1. Tone and saturation
Take a blue pigment and try 1. diluting with water, 2. mixing with increasing amounts of white, 3. mixing with black and adding increasing amounts of white, and 4. compare with black to which increasing amounts of white are added.
Try this for a warm blue like Ultramarine and a cool blue like Cerulean or Phthalo Blue. Adding water or white will make tints and adding black will darken the colour and de-saturate the blue. Adding white to this mix will produce blueish greys.
2. Optical properties
Dark and light surrounds, disappearing boundaries; very closely related hues of the same tone.
Make a study where similar shapes of one hue are surrounded by white, a much darker hue or by a closely related hue of the same tone. An example is given below.
You may choose to do 3 or 4 below;
3. Make a painting/study using just blue pigments
4. Make a painting or study using blue pigments, and black. You may also use white and a couple of analogous colours like a blueish green and/or a blueish purple. The general effect should be that you are making a predominantly blue and harmonious painting.
3 and 4 may be your own composition or your version of a famous painting where the predominant colour is blue.
What conditions make a blue advance, float, or recede?
With regard to tone and hue how does a background colour affect how a blue hue appears?
Pinterest board for reference.
The link for this week’s board is:
which includes abstract works by Patrick Heron, Marc Rothko, Josef Albers, Kandinsky and Matisse alongside works from Picasso’s blue period.