Being what sounds like a small room, I would not paint an accent wall nor do a dark trim. Here are a few examples without an accent wall but accents in the accessories.

You can also paint the walls in a creamy white and do purple accessories.

No, it's not small; it's approximately 500 square feet, excluding the three large closet spaces. It's shaped long and narrow with panoramic windows and a glass exterior door at the far end. That would be the only wall I could reasonably use for an accent wall. Does that change your recommendations? Too much white can easily make it look cold.

How Colors Change the Perception of Interior Spaces

"Cool Colors and Their Impact

"Cool colors, including blues, greens, and purples, tend to recede, making spaces feel larger and more open. These shades can foster a calm and serene atmosphere. For instance, light blue or soft green hues create airy environments, perfect for bedrooms or living areas. Pairing cool colors with ample natural light further enhances the spacious effect. In smaller rooms, you can utilize cool colors on walls while complementing them with neutral furnishings to ensure a balanced look. However, avoid using dark shades of cool colors, as they can create a closed-in feeling." -- How Paint Affects Room Size to Create an Illusion of Space and Comfort

• Purple Minimalist Bedroom
• Purple Simple & Serene Bedroom
• Purple Dreamy Bedroom

Can you post a picture of your room as well as the furniture you'll be using?

"Instead of using a bright, contrasting colour, designers are opting for more subtle and sophisticated approaches to accent walls."

You are painting just one room, but how will that room relate to the rest of the house? How will it relate to the furnishings, window treatments and bedding that is going in the room?

I am renovating a home and one bedroom has dark teal walls and ceiling and one will have deep purple walls and ceiling, but the other rooms in my home have a fair amount of rich colors. If I had all light walls throughout the rest of the home it would look like these bedrooms didn't belong.

I have white trim throughout and kept white trim in the bedrooms as well.

One other option for two tone paint is to paint the ceiling the dark purple, paint the walls lilac and keep the trim matching the rest of the home.

A few bedrooms with two tones Purple/lilac. . .

IMO that is the ONLY wall you should paint dark purple.

Paint the window wall a color and leave the other walls lighter to bounce the natural light from the windows around the room.

Nothing wrong with White. You can always add color in textiles and accessories.

Lyn, you are right, there is nothing wrong with white, if it is what you like. There is also nothing wrong with color.

I love MCM design, my sister loves her Queen Anne Victorian antiques. Is one of us right and one wrong, or just different?

Can you post a few photos of the space?

We did my daughter's room in shades of violet to match the linen and curtains she chose. Only after we painted the bathroom( also the guest bath) did I realize I should have gone lighter. To lighten it I had color wash it with the bright white trim paint. We decided to leave her bedroom walls white and just use purple in the bedding and accessories.

So my advice would be paint LARGE poster size samples to try in the natural light of the room. Those purples and blues suck the light out of a room and what looks great on a paint chip will be different on the walls. Consider deep purple drapes or bedding and very pale walls. Also be careful with the shade or hue of different purples which lean red or blue. Remember the red violet and blue violet crayons from elementary school.

Light purple walls and trim. Dark purple ceiling.

Pick a shade of purple or lilac and just paint ALL FOUR walls.

The bedroom isn't just about paint, no matter the color. It is about a wonderful bed, beautifully made, and a to die for comfortable mattress beneath the lovely linens on the bed.

It is about side tables within reach, the right temperature for sleep, the right amount of light or darkness to read or sleep. It's a private space, it matters not what the public rooms are in your home.

Google some images you love, and truly.....when you paint one wall? Just keep rolling.

The bed is the elephant in the room.....the walls a backdrop. I can think of no more lovely "accent" than the bed, and no more than that is necessary. Add art: )

Since we have no clue as to your space who knows . IMO accent walls are done usually on a wall with nothing breaking up the wall like windows or doors . I would never do trim in some ghastly color .Post a pic of your space and IMO wall color is driven by the bedding in most cases that is what I use to decide decor in a bedroom, so pics please .

Don’t know your style and what your furniture is like, so hard to make suggestions. If interested, look for rooms that resonate. Some “concepts“ below.

Wallpaper behind bed and whatever color you paint room, paint baseboards the same or white…not another purple. Let the bedding and art add the interest vs the array of paint colors.

Two colors and white basebosrds. Ensure focal wall has furniture that will ground and balance it.

Painting the ceiling can be impactful and fun.

Go bold all the way (same color baseboards).

I would paint all 4 walls lilac and then use purple accessories. Be careful when you buy purple draperies etc. Look at them in all lighting because some purple has a slight burgundy cast to it. I like purple in a bedroom. I have one bedroom that is purple and turquoise, and I never get tired of looking at it, or wanting to change it. Jennifer Hogan is correct though, you do need to make sure, that it goes with the rest of your house in some way, so it doesnt look like someone plopped a room from another house, and attached it. In my house it fits nicely.

I had a two-tone purple room with accent walls stripes and a fuchsia border near the ceiling. When we moved in and suggested it be my daughter's, she made gagging noises. It became my study, but I painted a color that was supposed to be a pinkish off-white, but turned out to be pale pink. It's such an improvement. I can put the decor I want in it, without always being stuck dealing with three shades of purple.

Paint is the last choice after the room is done, including its lighting. Wait until you have the bedding, draped, rug, wall art, accessories. Then decide on paint.

Coordinating things with paint is hard. Paint comes in infinite colours.

Lighting changes the look of paint.

@Beth Daily the room sounds like quite a challenge, so huge and long, and with three dressing rooms too. Both options mentioned equate to "trim". An accent wall that's all window isn't much different than trim. It's not going to have the effect of an accent wall. You sense that yourself. The eye tends to stop at the lightest or brightest surface. If you want to emphasize the interior of the room, leave the area surrounding the window lavender. If you want to emphasize the view outside the window, surround it with a dark muted purple to mix better with your lavender. Painting the trim a contrasting color is going to attract attention to the trim. Or maybe you just meant a darker version of the lavender, to create a tonal effect. And by "trim", do you mean the baseboard? If the floor is darker than lavender, then a darker purple baseboard could help blend the two surfaces, making the transition less harsh. Did you also intend to paint the trim to the doors to your three dressing rooms a darker purple to draw attention to them or would you leave them lavender to prevent breaking up the space? Are the doors natural wood or painted (or glass or mirrored). You haven't mentioned the ceiling. As others pointed out, you could create contrast with the ceiling as well, but it would help to know what the floor color is, and what the room height is. Does the ceiling feel low, high, or just right to you?

Finding textiles that you love after committing to a paint colour is far more difficult than finding a paint colour to coordinate with your fabrics ( from Houzz UK today)