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Showing posts with label Color. Show all posts
Showing posts with label Color. Show all posts

Monday, December 30, 2013

Questions about Black, Part 4 of 4

December 30, 2013 0
The last question is deceptively simple.

Is black a color?
The answer is no and yes, depending on how you mean the question, and what you mean by "color."

The "No" answer:
If you're talking about how the abstract concept of black fits into the infinite range of hues and chromas within the three-dimensional color universe, you might argue that it doesn't really belong with the others at all, because by definition it has no hue and no chroma. Black is not only the absence of color; it's even the absence of light.

Munsell Color Solid from Munsell.com
The "Yes" answer:
Looking at the question another way, the answer is yes. Black does have its place at the base of the 3-D chart of the color universe, where hues are arrayed around the outside, chroma (saturation) decreases toward the vertical center line, and value goes up or down with height.

Black has its own color swatch just like all the others. It sits at the zero point of value, the extreme pole beneath all dark colors. It's like the lowest note on the piano, one that you can include in a composition if you want to. In yesterday's post, we explored the arguments for and against using pure black in a painting, and just how pure that black pigment can be.

Just as black is a color, white and all the gray tones are colors, too, since each has its own location within the 3D color universe. They are like other keys on the piano, each a legitimate option that an artist may wish to include.

The surprising thing is that black, white, and the gray notes can function in a color scheme in such a way that they don't seem neutral at all. If you choose a gamut with two bright colors plus neutral black (and tints of black), the black suddenly becomes a very distinct subjective color. In the case of the color scheme at right, it would appear blue.

And this is where the "yes" answer becomes more than academic. Black really is a color that can be a core component of a luminous color scheme.


I demonstrate how this principle works in this video, which perhaps a lot of you have already seen. (Direct link to video)

In the end, it's good for beginning painters to be aware of the hazards of black. Many teachers rightly warn against using black carelessly, because it can deaden mixtures or kill the mood or the illusion of light in a painting. It's good to know how and when to mix your own black from other colors. But if you use black consciously, it deserves to be a valued part of any painter's toolkit.

"Questions about Black" Series
Part 2: Mixing your own black
Part 3: Using black in a painting
Part 4: Is Black a color?
Get my book "Color and Light" signed from my website or from Amazon.
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Friday, December 27, 2013

Questions about Black, Part 1 of 4

December 27, 2013 0
Nikolai Yaroshenko (1846-1898) The Student
Blog reader Kostas Kiriakakis asks:
“Is black part of your palette when mixing colors? Many artists state that they never use black but I don't understand if they mean that they don't like using it straight out of the tube on to the canvas or if they banned it even as a mixing component from their palette altogether.”

Hi, Kostas,
Good question and comment. Let me try answering them, and I'll ask a few more questions. I will do this as a three-part series.

Can you use black to darken a color?
Black is a very useful color. However many artists will tell you that if it is used to darken all the colors, it can "muddy" a color scheme. They are right. That's because black pigment will reduce chroma too quickly as it darkens or "tones" a color. Rather than looking like a darker version of the color, a color mixed with black will be both darker and a lot grayer, which can give the picture an unpleasant dullness. Another problem with black in mixtures is that it will often shift a hue toward another hue. For example, yellow turns green when mixed with black. 


David Briggs explains these phenomena on his excellent website HueValueChroma. In this diagram from his page on mixing with black, he compares how a mixture of permanent alizarin and white (A) changes as it is darkened by black, compared to a line of uniform saturation (B). The pigment mixtures are plotted using software from the website couleur.org.

How do you darken a color without using black?
To avoid that problem, painters use a variety of colors to darken or tone other colors. Usually these toning colors are pigments that appear dark right out of the tube, often because they are transparent. Ultramarine, the phthalo blues and greens, burnt umber, and permanent alizarin crimson can all be useful for toning other colors. By using these colors to darken your mixtures, you can control the chroma and, if you need to, pull it away from dullness, or just give it more interesting variations of chroma as the colors get darker, so that the dark realms of your colors aren't all monochromatic.

What are the uses for black?
Despite its tendency to be a color-mixing crutch for beginners, black has its uses. I love black pigment. I have a tube of black in all the media I paint with: oil, casein, gouache, and watercolor. I use black pigment most often when I'm painting in grisaille with just black and white, or in a super-limited palette of black, white, and another color. I also use it if I want an accent of the darkest possible value (more about that on Sunday).

Are all black pigments the same?
No. In watercolor, it's fun to experiment with different kinds of black: bone black, lamp black, Mars black. The pigment called "ivory black" used to be made from elephant ivory. Since that is now unavailable, some paint makers create ivory black by burning and grinding up fragments of mammoth ivory from Russia, which is legal to use. Each kind of black has different qualities of texture and chroma. If you get a couple of different blacks, you can play with them and compare them by painting them in a thin glaze, tinting them with white, and mixing them with other colors. 
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Wednesday, November 27, 2013

Color Gamuts in Botanical Illustration

November 27, 2013 1

Mervi Hjelmroos-Koski, Ph.D., D. Sc., Manager of The School of Botanical Art & Illustration in Denver, Colorado, recently gave her students an assignment to do a realistic botanical rendering as a way to understand color gamuts.

Mervi says: 
"We recently completed an advanced level workshop which followed James Gurney's book Color and Light: A Guide for the Realist Painter focusing on a botanical subject matter. The students learned about gamut mapping and limited palettes and found it to be extremely helpful in botanical work." 
"The class was very successful and several of the students even suggested that it should be a class within the required curriculum."


 "In the upper image no blue color was used - the lower image shows the same subject matter but without any yellow and blue added."
 Randy Raak was the instructor and the students used colored pencil.
 Please see more images from this course in addition to some other classroom shots by clicking here.
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Monday, September 23, 2013

Do women and men prefer different colors?

September 23, 2013 0

According to a British study, there are distinct differences in color preferences between the sexes. The peer-reviewed research concluded that women distinctly prefer cool reds and pinks compared to men. While most people prefer blue overall, women prefer a redder hue of blue, the authors claim.

Color wheel by J. A. Hatt, from The Colorist, 1908
Are these preferences biological or cultural? Neuroscientist Anya Hurlbert tried to isolate cultural factors by comparing the results of the mostly British caucasian participants to Chinese subjects, and they found similar results.

According to TS-SI News Service, prehistoric women might have preferred colorful objects and especially reddish objects so that they could "key in on ripe, red fruits... It is different for men. Hurlbert says thinking about colors is less important for them. As hunters, they look for something dark and shoot it."
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Monday, August 5, 2013

Why do artists prefer warm colors?

August 05, 2013 0
Here's a painting by Jasper Cropsey (1823-1900), who was known for his warm-tinted autumn landscapes. Cropsey's paintings in general tilted toward yellow and orange and red, and away from blue and green—even though blue and green predominate in the northeastern landscape most of the year 'round.

Cropsey was not alone among artists for warming his palette. A scientific study* compared the average warm/cool pixel distribution of random photographic images to average distributions among many artists' works, and the artists' color averages were distinctly warmer—much more yellow, orange and red, and much less blue and green than we see in nature. 

Why is this so? Are we as humans hard-wired to prefer a warmer palette? Do those colors remind us of sun or fire or spiritual realms? William James, in his book "The Varieties of Religious Experience," interviewed many people about the moments in their lives when they felt uniquely inspired, full of mystic revelation. He noted that many of those visions were tinged with golden colors, as are the interiors of many churches. But that doesn't really answer the question—it just poses another. 

Maybe some of you have ideas or anecdotes to shed some "golden light" on this discussion. 
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Wikipedia Jasper Cropsey (1823-1900)
*The chart is from a paper by Kun Zeng, Mingtian Zhao, Caiming Xiong, and Song-Chun Zhu.
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Wednesday, July 24, 2013

Color movement

July 24, 2013 0

I was looking for street scenes to sketch in a little Catskill mountain town. Nothing at eye level inspired me. So I looked up and noticed this false-fronted old building with a utility pole beside it. 

It was a cloudy day, and I wanted it to look bleak, so I used a very limited palette of watercolors and water-soluble colored pencils, just blues and browns. 

In order to balance the detail areas of the wires and the texture of the storefront, I kept other areas simple, such as the side of the building and the far trees.


But simple doesn't have to mean flat. Even in a limited palette like this, it's a good idea to look for color movement—the gradual shift from one color to another within an area. In watercolor, that meant wetting an area, preparing burnt sienna and ultramarine puddles on the palette, and then dropping more cool on one side and more warm on the other and letting them blend.
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Previously:
90 Degree Rule
Color Gradations
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Thursday, July 4, 2013

Most common flag colors

July 04, 2013 0
Steve Faeembra created this infographic to show which international flag colors are the most popular.

Red, white, and blue and not only the most popular individual colors, but they're also the most popular colors in combination with each other. According to Wikipedia, there are over 30 countries and territories with red, white, and blue flags:


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