Should I paint samples directly on the wall?

It works, but sample boards are usually better. A patch painted on the wall is influenced by the old color around it, cannot be moved, and on smooth walls can leave a ridge or a sheen difference that shows through the final coats unless it is sanded and primed. A board can travel to every wall and every light.

How big should a paint sample be?

As large as you reasonably can, and at least the size of a sheet of poster board rather than a postcard. Color reads differently across a large area than on a small chip, usually stronger and sometimes noticeably darker or brighter. A big sample shows you something much closer to the finished wall.

Why does my paint color look different at night?

Because the light has changed. Daylight in San Diego shifts from cool in the morning to warm late in the day, and indoor bulbs vary from warm to cool white. The same paint can look gray under one and beige under another. Look at your samples under the lamps you will actually use in the room.

How should I test an exterior color?

Put sample boards on more than one side of the house and look at them from the street, in full sun and in shade. Strong sun washes colors out, so south and west walls often read lighter than expected. Hold samples next to the roof, stone and anything that stays, and check your HOA palette first if there is one.

Testing Paint Samples the Right Way

Test paint colors on large sample boards with two coats, not on a chip or a small patch. Move each board around the room or house and look at it in the morning, at midday, in the evening and under your own lamps, next to the floor, trim and anything that is not changing. Let samples dry fully before judging, and narrow it to two or three before deciding.

A paint chip is about the size of a business card, seen under the lights of a store, held in your hand at arm’s length. A wall is a hundred times larger, lit by your windows at every hour, and sits next to a floor and a sofa you already own. It should not be a surprise that the two look different. Testing samples properly is how you close that gap before the paint is bought.

Why does a chip mislead?

Size is the first reason. Color reads more strongly across a large area than on a small swatch, so a gentle gray on a card can become heavy on four walls, and a soft yellow can become loud. Light is the second: the store’s lighting is nothing like your living room’s. The third is context. Your new color will sit beside your trim, your floor and your furniture, and every one of them pushes it slightly warmer or cooler.

Boards, not patches

Painting a square directly on the wall is the common way to test, and it has drawbacks. The old color around the patch changes how you see it; the patch cannot be moved to the darker corner or the other room; and on smooth walls, a thick sample patch can leave a ridge or a sheen difference that shows through the final coats unless it is sanded and spot-primed.

A better approach is a large sample board: a sheet of white poster board or a primed panel, painted with the sample. You can tape it to any wall, move it at noon, and stand it against the kitchen counter.

How to test, step by step

Narrow the field to three or four candidates using chips, then stop shopping.
Paint each board with two coats, leaving a narrow white border so the old wall color does not touch the sample.
Let them dry completely. Many colors look different wet than dry, and judging a damp sample is judging the wrong color.
Label the back of each board with the maker, the color name and number.
Place them where it matters: on the walls that get the most light and the least, near the floor, beside trim, next to cabinets or stone that will stay.
Look at them through a whole day (morning, midday and evening) and again at night under your own lamps.
Live with them for a few days, then remove one at a time until one is left.

Light, room by room and hour by hour

A room facing north gets cool, even light all day and tends to make colors look a little grayer. Rooms facing south and west get warm, strong light in the afternoon that can wash a color out and then turn it amber at sunset. Near the coast, as in Imperial Beach, the gray of a marine-layer morning makes many colors look duller until the sky clears. Inland, in El Cajon, the bright afternoon sun does the opposite.

Then there are bulbs. Warm white and cool white LEDs can make the same paint look beige in one room and gray in the next. Test under the lights you actually use in the evening, because that is when you will spend most of your time looking at the walls.

Don’t forget the sheen

Sample pots are often offered in a single sheen, which may not be the one going on your walls. A flatter finish looks softer and slightly darker; a glossier one reflects more and can look lighter and brighter. When you are close to a decision, ask whether the sample matches the sheen you plan to use, or keep the difference in mind. The guide to interior sheens room by room has more.

Testing an exterior color

Outside, test on more than one elevation and look from the street as well as up close. Full sun on a south or west wall bleaches color, so many exterior colors look lighter on the house than on the board in your hand. Textured stucco holds tiny shadows that can make a color read a touch deeper. Hold samples beside the roof tile, any stone or brick, the garage door and the neighbors’ houses. If you belong to an HOA, start from the approved palette, and test the combination of body, trim and door together.

For deep colors on hot walls, the light reflectance value (LRV) the maker publishes for each color matters as well; there is a guide to dark exterior colors in inland heat.

Same maker, same color

Test with the same maker’s paint that will go on the wall. A color matched across makers is often close, not always identical. Lemoon’s Painting uses Dunn-Edwards and Sherwin-Williams, and Ebenezer, who has a good eye for color, is glad to talk the shortlist through with you and look at the boards on your walls. There is broader advice on how to choose a paint color.

Bring your boards to the estimate

If you already have two or three favorites taped to the walls, that is a good place to start the conversation. Ask for a free estimate, and Ebenezer will look at the samples in your light, tell you honestly how each will read on the whole room, and plan the interior painting around the one you choose.