How to Mix Paint Colors

Mixing paint colors is both a practical skill and a bit of an art. Whether you're trying to create a custom color, use up leftover paint, or adjust a shade that's slightly off, knowing how to mix paint correctly saves money and gets you exactly the color you want. Here's everything you need to know about mixing paint colors at home.

When Should You Mix Paint Colors?

There are several situations where mixing paint makes sense: you want a custom color that isn't available off the shelf, you have leftover paint from previous projects and want to combine them, you need to adjust a color that's slightly too dark or too light, or you're trying to stretch a limited quantity of paint by combining similar shades.

Tools You'll Need

Paint can pour spout — for controlled, drip-free pouring when combining paints
Paint brush comb and mixing tool — for hand-mixing small quantities
Airtight paint storage container — for storing your mixed color
Paint color sample cards — for testing your mixed color before applying to the wall

The Golden Rules of Mixing Paint

Rule 1: Only Mix the Same Type of Paint

Never mix latex (water-based) paint with oil-based paint — they are chemically incompatible and will not blend properly. Always mix latex with latex and oil-based with oil-based. Within latex paints, you can mix different brands and sheens, but be aware that mixing sheens will produce an intermediate sheen level.

Rule 2: Mix in a Separate Container

Never mix directly in the original paint can if you might want to use the original color again. Pour the paints into a separate bucket or use an airtight storage container for mixing. This preserves your original colors in case the mix doesn't turn out as expected.

Rule 3: Add Dark to Light, Not Light to Dark

When mixing a dark color into a light one, always add the dark paint gradually to the light paint — never the other way around. Dark pigments are much more powerful than light ones, and a small amount of dark paint can dramatically shift a large quantity of light paint. Add in small increments and mix thoroughly between additions.

Rule 4: Mix More Than You Think You Need

Custom mixed colors are almost impossible to replicate exactly. Mix enough for the entire project plus a little extra for touch-ups, and store the remainder in an airtight container labeled with the mix ratio.

Step-by-Step: How to Mix Paint Colors

Stir each paint thoroughly before mixing to ensure the pigment is fully incorporated.
Pour the base color (usually the lighter color) into a clean mixing container using a pour spout for control.
Add the second color gradually in small amounts — start with about 10% of the total volume and mix thoroughly.
Mix completely using a stir stick or brush comb tool before assessing the color.
Test on a sample card or piece of cardboard and let it dry completely before evaluating — wet paint always looks darker than dry paint.
Adjust gradually until you reach the desired color, noting the ratio of each paint added.
Mix the full quantity at once using the same ratio to ensure consistency.

Mixing Paint to Adjust Color

Too dark: Add white paint gradually until you reach the desired lightness.
Too light: Add a small amount of the original color or a deeper shade in the same family.
Too warm: Add a small amount of a cool color (blue or gray) to neutralize warmth.
Too cool: Add a small amount of a warm color (yellow or beige) to add warmth.

Combining Leftover Paints

Combining multiple leftover paints of similar colors is a great way to create a usable quantity for a utility space like a garage, basement, or shed. Stick to colors in the same family (all warm neutrals, all grays, etc.) for the best result. Test the combined color on a sample card before applying to the wall.

Mixing paint is straightforward when you follow the rules: same type only, add dark to light, mix in a separate container, and always test before applying. Take notes on your ratios so you can replicate the mix if you need more.

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