See Your Home in Any Color Before You Paint a Single Stroke — Free

Your roof, brick, stone, and any permanent hardscaping are fixed constraints, and they carry strong undertones. A brown-grey roof pushes you toward warm greiges and away from crisp blue-greys. Red brick fights most warm beiges and looks excellent against deep greens, charcoals and creamy whites.

Photograph these fixed elements in daylight and pick your palette against them, not in isolation. The single most common exterior paint mistake is choosing a color that is genuinely beautiful but sits in a different temperature family than the roof — resulting in a house that looks subtly wrong for reasons the owner cannot identify.

Light Reflectance Value runs from 0 for absolute black to 100 for pure white, and every major manufacturer publishes it. Outdoors, direct sun washes color out dramatically: a color will read roughly one to two shades lighter on a sunlit wall than it does on the chip in your hand.

That means if you want a mid-tone grey house, you should generally choose a paint with an LRV in the high 30s to low 50s rather than the 60s. And if you fell in love with a very dark color, know that an LRV under about 25 absorbs significant heat, which accelerates fading and can stress wood siding on south and west exposures.

Buy sample pots and paint at least a two-by-two-foot patch. Anything smaller is dominated by whatever is around it and tells you almost nothing. Better still, paint two large poster boards per color so you can move them around the house.

Then look at each candidate on a north wall and a south wall, and check it at morning, midday and dusk. North-facing walls receive cool indirect light all day and will pull blue and grey undertones forward. South and west walls get intense direct sun that flattens and lightens color. A color that works on all exposures is a safe color; a color that only works on one is a gamble.

A reliable exterior scheme uses one field color for the bulk of the siding, one trim color for windows, corners and fascia, and one accent color for the front door and shutters. Roughly 60 percent field, 30 percent trim, 10 percent accent.

For contrast, either go clearly light-on-dark or dark-on-light — a trim color that is only slightly different from the siding reads as a mistake rather than a choice. The front door is the one place to be genuinely bold, because it is small, cheap to repaint, and it is where the eye lands first.

For exteriors, 100 percent acrylic latex is the current standard for most siding — it stays flexible through freeze-thaw cycles, resists fading and breathes enough to release trapped moisture. Expect roughly 350 square feet of coverage per gallon on smooth siding and considerably less on rough or porous surfaces.

Prep is where paint jobs actually succeed or fail. Wash the surface, scrape and sand failing paint, caulk gaps, and prime any bare wood or stains. A quality paint over poor prep will peel within a few years; a mid-range paint over excellent prep will outlast it comfortably. Also avoid painting in direct sun or above roughly 90 degrees Fahrenheit, since paint that dries too fast does not form a durable film.