You can mix a convincing gray without using black or white by combining complementary colors—colors opposite each other on the color wheel—or by mixing several colors that balance one another. The result may be warmer, cooler, or more muted than a gray made from black and white, which is useful for natural-looking shadows, landscapes, and paintings. Start with artist paints or another opaque, mixable medium, and test small amounts before mixing a large batch.
What You’ll Need
- Two paints that can mix together, such as blue and orange, red and green, or yellow and violet. Choose colors from the same type of paint system, such as acrylic with acrylic.
- A palette or other non-porous mixing surface.
- A palette knife or clean brush for mixing.
- Scrap paper or a sample of your painting surface for testing.
- Optional: a color wheel and a damp cloth or water for cleaning tools. Use only the thinner or medium recommended for your paint.
Step-by-Step
- Choose a route to gray. The most straightforward approach is to mix complementary colors: blue with orange, red with green, or yellow with violet. Their opposing color biases reduce one another’s vividness. Depending on the exact pigments, the mixture can become neutral gray, a muted brown, or a colored gray. For a cooler gray, begin with blue and orange; for a warmer one, try red and green.
- Check your pigments. “Blue” or “orange” can describe many different paints, and some pigments have strong underlying color biases. Look at the labels if available, and select a pair that seems balanced rather than extremely bright or dark. Avoid adding several unrelated colors at the start: more pigments can make the result muddy and harder to adjust.
- Put out a small amount of the lighter or less dominant paint. Make a small puddle on your palette. If the pair includes a strong, deep blue or a powerful red, use a milder color as your starting base. Do not mix the whole supply at once; complementary paint mixes can shift quickly with tiny additions.
- Add the complementary color gradually. Pick up a small dab with a clean palette knife and blend it thoroughly into the base. Repeat in tiny increments, mixing fully each time. There is no single correct ratio: pigments vary in strength, so judge by appearance rather than relying on a fixed measurement.
- Look for reduced saturation. As the colors combine, the bright hue should become less intense. Stop when the mixture looks gray enough for your purpose. If it still looks distinctly blue, orange, green, or another color, add a very small amount of its complement. Mix and check again before adding more.
- Adjust the temperature without using black or white. If the gray is too warm or too cool, add a trace of the color that shifts it toward your target. A touch of blue can cool a warm gray; a touch of orange or red can warm a cool gray. Use very small amounts, because this can also change how light or dark the gray appears.
- Adjust lightness by changing the balance of the pair. Without white, you cannot simply lighten a dark gray while keeping the same color. Instead, make a separate, lighter batch using a greater share of the lighter pigment in your chosen pair, then add the darker partner gradually until it becomes gray. To make a darker gray, start with more of the darker pigment and carefully balance it with its complement. This changes the gray’s character as well as its value.
- Test the mixture on the actual surface. Spread a small sample on scrap paper or a spare piece of the same material. Let it dry if you are using paint that changes as it dries. Compare it with your intended subject in the same lighting. Once satisfied, mix enough for the area you need, keeping the proportions consistent.
Common Mistakes
- Adding too much complement at once: The mixture can swing from one colored gray to the opposite hue. Work with tiny additions and mix completely before judging.
- Expecting every pair to make a neutral gray: Pigment properties differ. Some combinations make gray-brown, green-gray, or violet-gray instead. Choose another complementary pair if the result is too muddy or too colorful.
- Using a dirty brush or palette: Leftover paint introduces extra colors and can dull or shift the mix. Clean tools between adjustments.
- Trying to lighten a dark gray with more of the same mixture: That changes the quantity, not the lightness. Make a new batch with more of the lighter color in the pair, then balance it with the complement.
- Judging wet paint alone: Some paints dry lighter, darker, or less glossy than they look when wet. Test and allow the sample to dry before making a large batch.
Tips
- Keep a simple record of the colors and approximate proportions if you need to repeat the gray later. Ratios are useful for consistency, but they may not transfer between brands or pigment types.
- Make a small swatch chart using different complementary pairs. Label each one so you can compare warm, cool, and muted options.
- Use a palette knife for thorough mixing, especially with thick paint. Streaks can make a mixture appear more neutral than it really is.
- For a natural-looking gray, avoid forcing perfect neutrality. A subtle blue-gray or warm gray often looks more convincing in a painted scene.
- When using watercolor, complementary colors can make a subdued gray, but the result may be less opaque and more variable than with acrylic or oil. Test on the intended paper and avoid adding excess water if you want stronger coverage.
Troubleshooting
My mixture looks brown. Many complementary pairs naturally lean brown, particularly if one pigment is earthy or both colors are warm. Try a different pair, such as a cleaner blue and orange, or add a tiny amount of the hue opposite the unwanted brown cast. Make a test swatch before changing the full batch.
It still looks strongly colored. Identify the dominant hue, then add a trace of its complement. If the paint becomes dull but remains colored, the pigments may not balance well; start a fresh sample with another pair rather than adding many colors.
The gray is too dark. Without white, you cannot raise its lightness while keeping the mixture unchanged. Prepare a lighter version from the same pair by increasing the share of the lighter paint, then add the darker paint in tiny increments to restore a gray balance.
The gray changes after drying. Make a larger test swatch, let it dry fully, and adjust a fresh mix based on that result. Do not correct the wet mixture solely by guessing how much it will change.
Frequently Asked Questions
What colors make gray without black and white?
Complementary pairs such as blue and orange, red and green, or yellow and violet can produce gray or a muted gray-like color. The exact result depends on the pigments.
Can I make gray with just two colors?
Yes. Start with two complementary colors and add one to the other in small amounts. Some pairs make a neutral gray; others lean brown or toward one of the component colors.
Which color combination makes the coolest gray?
Blue and orange often make a cooler-looking gray, especially when the blue remains slightly dominant. Test the particular paints you own, since pigment choices affect the result.
Can I make a light gray without white?
Yes, but it is difficult to make a very pale gray using dark pigments. Start with lighter versions of complementary colors and add the stronger or darker color sparingly. You cannot brighten an already mixed dark gray without changing its pigment balance.
Does mixing paint differ from mixing colored light?
Yes. This guide is for physical paints or similar pigments, which mix subtractively. Colored light mixes differently, so paint-mixing combinations do not apply directly to screens or lighting.