Take it from a pro, EVERYONE needs to test paint colors, even me. I recently got complacent, and decided to paint one of my bedrooms Sherwin Williams Incredible White without testing. This gorgeous color that has never failed me looked like pepto bismol! It cost me $400 to repaint the room.
What if you could accurately test paint colors before you invest your time, energy and hard cold cash on a new paint job? Here you go!
Use a large painted poster board instead of a paint swatch
Undertones are much easier to see when you use a poster board instead of a tiny paint swatch. The poster board should be at least 8.5 x 11, and bigger is better. Make sure that the poster board has 2 coats of paint. Small paint swatches don’t have enough surface area to see enough of the undertones, and look different than the paint board. Compare all your options to find your favorite.
In the photo below, the color swatch looks MUCH darker than the painted color board behind it. Both colors are Benjamin Moore Hale Navy HC-154.
Test paint colors in daylight
Natural light is critical to test the undertones of your paint colors. If it works in natural light, it will look great with artificial light. If the room does not have windows, test after lighting in the room has been finalized. An LED will look different than an incandescent light.
Ensure the surfaces in the room are clean before you test paint colors
Sometimes a color looks dingy because its dirty, not because its the wrong color for the room. I recommended a wall color once for a bathroom. When the client moved in, they steam cleaned the floor tile, and it changed from pink beige to bright white, and we had to repaint. In another project, we tried to match an exterior white. Once we cleaned it, we chose a much different color.
Surround samples with white and place the same way it will exist in the room
When you contrast a test board with white, it removes distraction from the current color. If you are testing a wall, look at the poster vertically. Test the paint colors at different times of day.
Move sample board around the room for interiors, and around the house for exteriors
View the color next to hard finishes, furniture and art. Make sure that it looks right on every wall.
Give yourself at least one day to make your decision
Test the paint colors at different times of day. Morning, noon and evening light varies and can make the color look different.
Test your final color choice on the wall inside or outside
The test area should be at least 5 ft by 5ft. The easiest way to see your colors is to isolate it in a large section, next to the hard or existing finishes you need to match. Also consider painting white around the edges so that you can isolate the color more effectively. Areas with wall corners and edges work very well.
For an interior, paint a wall that is next to a door or molding, and has a painting and furniture. The more furniture or existing finishes you can use to compare, the better your results will be.
For an exterior, consider painting a trim color and wall color in a corner, around a window or near existing brick or stone. The following would be good areas to test.

Exterior paint color test over garage, next to trim and stone.
The Verdict
You can save time and money with the perfect paint color when you follow these steps.
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Can you please tell me the differences and similarities of Agreeable Gray and Modern Gray. There is no color strip for Modern Gray so I’m a bit confused about the undertones.
Hi Ruth,
Agreeable Gray is a lovely mid-toned gray with green undertones and slight violet undertones mixed in. It is a pretty magical color. It has an LRV of 60, which is considered slightly light reflecting. The LRV scale goes from 0 to 100 (Dark to Light scale). Modern Gray has a similar LRV at 62, and is very slightly lighter than AG. Modern Gray has taupe undertones, which are warmer than Agreeable Gray. On a chip they will look very close, but once you paint them on a wall they will look completely different. Hope that helps! If you have questions about our recent online consult specifically, please let me know directly. Thanks, Michelle
Hi, I have painted the living room and the paint on the walls looks different coz the house is facing south. I like to paint the room white, what colour white would you recommend.
Thanks
Hi Zakia,
Its hard for us to recommend a color without having more information. Please consider an online color consulting package. I would recommend the Color Your Room package. https://thecolorconcierge.com/downloads/color-your-room/
Have a great day!
Michelle
Using a paint board is a great idea, but doesn’t that require buying a small can of the paint? I can’t imagine any other way to do it. Please advise.
Hi Lynn,
Yes, you do need to purchase a small can of paint.
Michelle
Hi Michelle,
Its cost me a small fortune in mistakes with paint colours and all the undertones. The lighting in the hardware store are so difficult to see what it woukd look like. Great idea about using a larger chip in the room you want to paint.
Hi Pauline,
The other tip that is very important is to look at the paint colors with natural light and without overhead lights on.
Thanks!
Michelle