How Interior Designers Really Choose Paint Colors: A Room-by-Room Guide

People ask me all the time how I pick paint colors. And I get it, because standing in front of a wall of chips at the paint store is genuinely overwhelming. The short answer is that I don't start at the paint store. I start by looking at what's already in the room that I can't change.

The floor, the countertops, the tile, the fireplace surround. Those fixed elements have undertones that will either work with your paint color or fight it. So before I even think about colors I like, I pull out the flooring sample or take a photo under natural light and look hard at what colors are already living in the room. A warm honey-toned hardwood floor, for instance, has yellow and orange undertones. Paint that room with a cool gray and you'll end up with something that looks slightly purple or muddy, depending on the light.

Understanding Undertones

Every paint color has an undertone, and it's usually not the color you think it is. A beige can read pink, yellow, green, or gray depending on the light and what surrounds it. Sherwin-Williams Accessible Beige (SW 7036) is one of the most popular neutrals in the country, and it leans slightly green-gray. In a north-facing room with cool light, that green undertone becomes very obvious. In a warm, south-facing room, it disappears and reads as a classic warm neutral.

I always tell clients: the color on the chip is not the color on your wall. Chips are small, the light falling on them is store fluorescent, and there's no surrounding context. You have to test the actual paint in the actual room.

When I'm working with clients, I typically narrow things down to two or three options and buy sample pots of each. I paint large swatches, at least 12 by 12 inches, on white poster board so I can move them around the room. Then we look at them in the morning, at noon, and in the evening under artificial light. A color that looks perfect at 10 a.m. can look completely wrong under warm incandescent lighting at 8 p.m. That's not a defect. It's just how color works.

What LRV Means and Why It Matters

LRV stands for Light Reflectance Value. It's a number between 0 and 100 that tells you how much light a color reflects back into the room. Pure black is 0, pure white is 100. Most usable wall colors sit somewhere between 25 and 85.

In a small room with limited windows, I'd suggest staying above 55 on the LRV scale. That doesn't mean you're stuck with white. Benjamin Moore Pale Oak (OC-20) has an LRV of around 69 and reads as a warm, creamy tone rather than stark white. It's one of my favorites for rooms that need to feel bigger without looking clinical.

Dark colors, in the right context, can actually make a room feel more intimate and special rather than small and dark. A dining room painted in Benjamin Moore Hale Navy (HC-154) with an LRV of about 8 can feel like a jewel box if the lighting is designed to compensate. But you need good lighting. Dark walls absorb light, and if you don't plan for that, the room will just feel dim.

The 60-30-10 Rule

This is a guideline that's been around for decades, and it holds up well in practice. The idea is that your dominant color takes up roughly 60% of the visual space in a room, a secondary color takes up 30%, and an accent color accounts for the remaining 10%.

In a living room, the 60% is usually the wall color. The 30% is your largest furniture pieces, rugs, and drapery. And the 10% is throw pillows, artwork, accessories, and small decorative objects. What I like about this framework is that it keeps rooms from feeling chaotic without making them feel flat. The 10% accent is where you can go bold, because a little goes a long way.

I've found that clients who skip this structure often end up with rooms that feel "off" in a way they can't quite name. Everything is fine individually, but nothing connects.

Coordinating Colors Across Adjacent Rooms

Open floor plans present a real challenge. When you can see from the kitchen into the dining room into the living room all at once, those paint colors have to work as a family. I don't mean they all need to match. But they need to share an undertone family, whether warm or cool, so the eye travels naturally from one space to the next.

One approach I return to often is using the same color at different depths. The living room gets the lightest version, the hallway gets a mid-tone, and an accent room or powder bath gets the deepest version. Benjamin Moore's fan decks are organized exactly this way, which makes it easy to pull coordinating tones from the same color strip.

For rooms that need their own identity, I pull a color from the adjacent room's upholstery or rug and use that as the wall color in the next space. It creates a visual handoff that feels intentional rather than random.

Paint Collections Worth Knowing

I work primarily with Benjamin Moore and Sherwin-Williams because they have excellent color consistency between batches and the paint quality is reliable. A few specific colors come up repeatedly in my work with Central Florida clients.

Benjamin Moore White Dove (OC-17) is my most-used white. It's warm without being yellow, and it pairs with almost everything. Cloud White (OC-130) is slightly warmer and creamier. For a true white that stays crisp without going stark, Chantilly Lace (OC-65) is hard to beat. On the Sherwin-Williams side, Agreeable Gray (SW 7029) remains incredibly popular because it reads as a true greige, warm enough to feel inviting but neutral enough to go with most furniture.

Sherwin-Williams releases a Color of the Year each year, and Benjamin Moore does the same. They're worth paying attention to, not because you should follow trends, but because those colors signal where furniture and textile manufacturers are heading. Knowing that can help you choose a wall color that won't feel dated in two years when you update your sofa.

My Room-by-Room Approach

Living rooms benefit from colors in the 50 to 70 LRV range. Warm tones tend to make conversation feel more relaxed. Cool tones read as more formal.

Bedrooms are where I give clients permission to be a little bolder. Because you're mostly in that room at night, under lamp light, you can go darker and moodier than you might expect. Dusty blues, sage greens, and warm terracotta tones all work beautifully in bedrooms lit with warm bulbs in the 2700K range.

Kitchens in Florida often get a lot of natural light, which is great. But that strong light can wash out soft colors and make them disappear entirely by midday. I often suggest going slightly more saturated in kitchens than clients initially expect, so the color still reads at its best when the sun is coming in at full force.

Bathrooms are small, and small rooms do well with either very light colors or very dark, moody ones. Anything in the middle can look muddy. A powder bath is actually a perfect place to take a risk with a deep, saturated color, because you're only in it for a few minutes at a time.