How to Mix Paint Before Painting: Prep and Premix Colors

Skipping preparation is one of the quietest causes of disappointing paintings. Separated binder makes the first strokes runny and the last ones chalky. Colors mixed on the fly with a brush end up streaky, slightly different every time and never quite enough. Spending ten minutes on how to mix paint before painting saves you from patchy color, mismatched touch-ups and wasted paint.

Most of this work is done with a palette knife rather than a brush. If you need to put a basic kit together, see our guide to palette knives and stirrers for mixing paint.

Why Paint Needs Mixing Before You Start

Paint is a suspension: solid pigment particles floating in a liquid or paste binder. Over time, gravity pulls heavier pigments down and lets lighter binder rise. You might see it as:

• A layer of clear oil squeezing out of an oil paint tube before the color
• Watery liquid on top of acrylic or craft paint in a bottle or jar
• A thick, almost solid layer at the bottom of a jar of tempera or poster paint
• Skins or dried rings around the lid of a pot

Using paint in that state gives inconsistent color and handling. The fix is simple, but it varies by container.

Stage One: How to Mix Paint in Its Container

Tubes (oil, acrylic, gouache, watercolor)

1. Squeeze the tube gently from the bottom up a few times with the cap on. This kneads pigment and binder back together.
2. Roll the tube between your palms for 20–30 seconds, especially in a cold room, to soften the paint.
3. If clear oil still comes out first, squeeze that small amount onto a paper towel and discard it, or knead the tube longer next time.
4. For very old oil paint that has separated badly, squeeze it out onto the palette and mix it with a knife before use.

Squeeze bottles (craft and fluid acrylic)

1. Cap tightly and shake firmly for 20–30 seconds.
2. Turn the bottle upside down and let it rest briefly, then shake again. Paint near the bottom often needs more agitation.
3. Squeeze a test dot onto paper. If it looks watery or streaky, shake more.

Jars and pots (tempera, acrylic in jars, gesso)

1. Open the lid and remove any dried skin with a knife. Do not stir skins into the paint; they create lumps.
2. Stir with a flat stick or palette knife, scraping the bottom and sides. A figure-eight motion lifts settled pigment better than a circular swirl.
3. Stir until color and texture look the same from top to bottom, usually a minute or two.
4. For thick gesso, a small mixer or stirrer saves effort and gives a smoother result.

Pans (watercolor and gouache cakes)

Dry pans do not separate the same way, but they benefit from preparation. Mist each pan with a few drops of clean water about a minute before painting so the surface softens and releases pigment easily.

What Tools Do I Need to Paint and Mix Colors?

A small, reliable kit handles nearly all mixing tasks:

Stage Two: How to Premix Colors on the Palette

Premixing means preparing your main colors before you begin painting, instead of mixing each stroke as you go. It is especially valuable for backgrounds, skies and any large shape that must stay consistent.

1. Lay out paint in a consistent order. Arrange colors around the edge of the palette the same way every time, such as warm to cool with white in a corner. This leaves the center free for mixing and builds muscle memory.
2. Decide on the key mixes. Look at your reference or sketch and identify the main colors you need, usually four to eight.
3. Start with the lighter color. Put the lighter or weaker color down first, then add small amounts of the stronger one. A tiny bit of dark changes a light color quickly, while the reverse takes much more paint.
4. Mix with the knife, not the brush. Pull a little of each color into the center. Press the knife flat, spread the paint into a thin layer, scrape it back into a pile and repeat. This fold-and-press motion is more thorough than stirring.
5. Check for streaks. Spread a thin swipe of the mix. If you see threads of the original colors, keep mixing.
6. Test against your reference. Dab a little on a scrap or the palette edge next to your reference color, or hold the knife up to it. Adjust in small steps.
7. Make more than you think you need. Running out and remixing almost always gives a slightly different color. For a large area, mix roughly a third more than your estimate.
8. Clean the knife between mixes. Wipe it with a rag so one color does not contaminate the next.

Mixing Value Strings Before Painting

A value string is a row of one color mixed from light to dark in steps. Premixing a string of three to five values before you start makes modeling form much easier.

1. Mix your mid-value version of the color first.
2. Split it into a light pile and a dark pile.
3. Lighten one pile with white or a lighter color, and darken the other with a darker color rather than black alone, which can deaden it.
4. Mix intermediate steps between them.
5. Lay the piles in order across the palette so you can pick the value you need without thinking.

This approach is common for portraits and landscapes, but it also helps with simple subjects like fruit, clouds and flowers.

Color Mixing Basics Worth Knowing Before You Start

Premixing goes faster when you can predict roughly what two colors will make. A few principles cover most situations:

• Every pigment has a bias. A “red” leans toward orange or toward violet, and a “blue” leans toward green or toward violet. Mixing two colors that lean toward each other gives cleaner secondaries. A green-leaning blue and a green-leaning yellow make a brighter green than a violet-leaning blue with an orange-leaning yellow.
• Complements neutralize. Adding a little of a color’s opposite (orange into blue, red into green) lowers its intensity without turning it gray as fast as black would.
• White cools and chalks. White lightens value but also reduces saturation and often shifts colors slightly cooler. A touch of yellow or a lighter warm color can lighten without the chalky look.
• Some pigments are very strong. Phthalo blue, phthalo green and similar modern pigments overpower others quickly. Add them in tiny amounts.
• Wet and dry color differ. Acrylic often dries slightly darker, while watercolor dries noticeably lighter. Test a swatch and let it dry before committing to a large premix.

Adjusting Consistency While You Mix

Mixing is also the right moment to adjust how paint handles:

• Acrylic: add a little water or acrylic medium for flow. Keep water modest so the binder stays strong.
• Oil: add a small amount of medium with the knife. Early layers can be leaner (more solvent), later layers richer (more oil).
• Watercolor: control strength by the ratio of pigment to water in each well rather than by thickness.
• Gouache: mix to a creamy, yogurt-like consistency for flat, opaque coverage.

Mix the medium into the whole batch rather than dipping your brush into medium as you paint. That keeps the color and sheen consistent.

Keeping Premixed Paint Workable

• Acrylic: use a stay-wet palette or mist lightly. Cover mixes with plastic wrap during breaks. Small lidded cups keep mixes usable for days.
• Oil: mixes stay workable for hours on an open palette and longer if covered or placed in a cool spot.
• Watercolor: dried mixes in wells can simply be rewetted.
• Gouache: rewettable, but the texture may change; mist and stir with a brush before reuse.

Is There a Blending Tool in Paint?

This question comes up in two forms. For physical painting, blending happens on the surface after mixing, using tools like soft synthetic brushes, fan brushes, dry flat brushes, makeup-style sponges, palette knives and even fingertips for some media. Blending is different from mixing: mixing prepares a uniform color on the palette, while blending creates smooth transitions on the painting itself.

If the question refers to the Microsoft Paint app, its classic versions have not included a dedicated smudge or blend brush. Digital painters usually turn to programs with a smudge or blending brush for that effect. Physical paint, however, gives you plenty of options.

Common Mistakes When Mixing Paint Before Painting

• Using separated paint straight from the container. The first strokes will be thin and the last will be dull.
• Mixing with a good brush. It wears bristles out and leaves paint in the ferrule. Use a knife.
• Adding dark to light in big amounts. You will overshoot and waste paint.
• Undermixing. Streaks of unmixed color show up in flat areas.
• Overmixing too many colors. Combining more than three pigments often produces mud.
• Not making enough. Remixing mid-area produces visible color shifts.
• Judging color under poor light. Warm indoor bulbs shift how colors look. Use neutral daylight-type light when possible.

A Quick Pre-Painting Routine

1. Shake, knead or stir every color you plan to use.
2. Lay out the palette in your usual order.
3. Premix the main colors with a knife.
4. Mix a value string for the most important color.
5. Adjust consistency with water or medium in the batch.
6. Cover or mist mixes you will not use immediately.
7. Start painting.

Once your colors are ready, choosing a manageable first subject helps build confidence. For starting points, look through these easy ideas for what to paint on a canvas.

FAQs

How do you mix paint properly?

Restore the paint in its container first by shaking, kneading or stirring. Then mix colors on a palette with a palette knife, folding and pressing until there are no streaks, and test the color before applying it.

Should you stir or shake acrylic paint?

Shake bottles and stir jars. Tubes can be kneaded. Either way, the goal is to recombine pigment and binder fully before use.

Why does clear liquid come out of my paint tube?

That is binder that has separated from the pigment. Knead the tube before opening, or squeeze the small amount of liquid onto a towel and then use the paint.

Is a palette knife better than a brush for mixing?

Yes, for most mixing. A knife mixes more thoroughly, wastes less paint and protects your brushes from wear.

How much paint should I premix?

Enough to finish the whole area you are painting, plus roughly a third extra. Running out and remixing usually creates visible color differences.

Can you premix acrylic paint and store it?

Yes. Airtight containers keep mixed acrylic usable for days or longer. Stir before reuse and add a little water or medium if it has thickened.

Final Thoughts

Good painting sessions start with good paint: fully recombined in its container and premixed into consistent colors before your brush touches the surface. A palette knife, a few stir sticks and a sensible routine are all it takes. To find dependable knives, stirrers and mixers for that routine, explore our roundup of top-rated paint mixing tools for crafts and fine art.