Mastering Color Theory in Adult Coloring: A Comprehensive Guide

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Have you ever finished a coloring page and felt the colors didn't quite work together, without knowing why? Color theory is the set of ideas artists use to answer that question. You don't need to study it for years. A few basics will help you choose colors with confidence, and each one can be tried on a single page.

The color wheel

The color wheel arranges colors in a circle, so you can see how they relate.

• Primary colors: red, yellow and blue. In traditional color mixing, they can't be made from other colors.
• Secondary colors: orange, green and purple, each made by mixing two primaries.
• Tertiary colors: the six in-between colors, such as yellow-green or red-orange, made by mixing a primary with a neighboring secondary.

A physical color wheel is handy to keep next to your pencils: turn it to any color and it shows that color's complement and other matches.

Try it: with colored pencils, layer yellow over blue to make green, then red over yellow to make orange. Layering lightly lets colors mix on the page, the same way paints mix. A large set, such as Castle Art Supplies' 72 colors, gives you most tertiaries ready-made too.

Hue, value and saturation

Every color has three qualities:

• Hue is the color family: red, blue, green.
• Value is how light or dark it is.
• Saturation is how intense or muted it is.

Value is as important as hue. A page with a good range of light and dark looks clear and three-dimensional even with unusual colors, while a page where every color has a similar value can look flat. Grayscale coloring pages show this well: the gray underlayer supplies the values, and you choose the hues.

Try it: squint at a finished page, or take a photo and switch it to black and white. If everything turns the same gray, add darker shadows and lighter highlights.

Warm and cool colors

Reds, oranges and yellows are called warm colors; blues, greens and purples are cool. Warm colors tend to look closer to the viewer and cool colors farther away, which is why distant hills in landscapes often look blue.

Use this on a page: color the main subject in warmer colors and the background in cooler ones, and the subject will stand out.

Try it: color the same small design twice, once in warm colors and once in cool colors, and compare how each feels. Our 30 Autumn Color Palettes are a good source of warm schemes.

Color harmonies

A color harmony is a set of colors chosen by their positions on the wheel. They're a quick way to pick colors that work together.

• Complementary: two colors opposite each other, such as blue and orange or red and green. They create strong contrast and make each other look brighter. Use one as the main color and the other as an accent.
• Analogous: three or four neighbors on the wheel, such as yellow, yellow-green and green. They feel calm and unified, which suits nature scenes and florals.
• Triadic: three colors evenly spaced around the wheel, such as red, yellow and blue. Lively and balanced; let one color lead.
• Split-complementary: one color plus the two neighbors of its complement, such as blue with yellow-orange and red-orange. Strong contrast, but easier to balance than a straight complementary pair.
• Monochromatic: light and dark versions of a single hue. Simple and elegant, and good practice for value.

For ready-made examples, browse our 30 Flower Color Palettes and 30 Christmas Color Palette Ideas, and see How to Use Color Palettes for Coloring Pages for how to apply them.

Try it: pick one design and color it with an analogous scheme, then a complementary one.

Color and mood

Colors are often linked with moods. Blues and greens are often described as calm, reds and oranges as energetic, and soft pastels as gentle. These associations aren't fixed, though. Meanings vary between cultures (white is worn for weddings in some places and for mourning in others) and between people. Your own reactions are a good guide, so choose colors for the mood you want the page to have.

Contrast and color interaction

Colors change depending on what's next to them. The same gray looks lighter on a black background and darker on a white one, and a color looks more intense next to its complement. The artist Josef Albers built a whole book, Interaction of Color, around experiments like these.

On a coloring page, put your strongest contrast (lightest next to darkest, or complements side by side) where you want the eye to go first, and keep the background quieter.

Applying color theory to a page

1. Choose a focal point, the part you want people to notice first.
2. Pick a harmony and limit yourself to 3–5 main colors, plus lighter and darker versions of each.
3. Swatch first. Test your colors together on scrap paper or in a sketchbook before committing. Colors on paper often look different from the pencil barrel.
4. Decide where the light comes from, and plan where the darkest and lightest areas go.
5. Layer. Build color in light layers. Soft pencils such as Prismacolor Premier mix easily on the page, and oil-based Faber-Castell Polychromos hold a point for fine detail.
6. Blend the layers with a colorless blender pencil.
7. Use the complement for shadows. A light layer of a color's complement darkens it more naturally than black does.
8. Leave some white space. Uncolored areas give the eye a rest and make the colors around them look brighter.

Using markers? Alcohol markers work well for bold complementary schemes. Lay down the lighter color first.

Keep learning

Books:

• Interaction of Color by Josef Albers: how colors change each other.
• The Elements of Color by Johannes Itten: a shorter edition of his classic book on the color wheel and seven kinds of color contrast.
• Color and Light by James Gurney: how light and shadow affect color, written for artists.

Free tools: Adobe Color shows harmonies on an interactive wheel and can pull a palette from any photo.

Palettes: our Color Palettes blog has 90 ready-made schemes for coloring pages.

For more techniques, read Unlock Your Creative Potential with Adult Coloring Techniques, and for help choosing supplies, see Explore Top Coloring Tools.

Put it into practice

Choose a page, pick a harmony, and try it. Our free coloring pages are a no-cost place to experiment, and our adult coloring pages give you hundreds more designs to try new color schemes on.