Blue and White Is Always Right: See Inside This Family-Friendly Dallas Home

Berry's best tip for giving old-school style a new look? Turn up the volume a notch. "This design is traditional in that the patterns are timeless, but the colors are a bit younger and brighter, even the whites," she says. The entry's rug—a classic motif that's cast in an updated blush-green-and-orange colorway—shows off the plan right at the front door.

With go-anywhere furnishings locked in, Berry turned to color and pattern to add visual interest to the walls. "Wallpaper instantly filled up those rooms that would have stood out as seeming unfinished or blank," she says. Thanks to openings into the living and family rooms, the dining room's chartreuse Quadrille San Marco paper energizes the adjacent spaces too. Was it a risk? "It didn't feel like one," Berry says. She sprinkled that same green throughout the rest of the house so the paper wasn't a one-off move.

Spend your money on big-ticket items that need to be comfortable—like sofas, chairs, and a dining set, says Berry. It's okay to scrimp on the rest. While shopping for this family, she zeroed in on pieces with traditional lines then upholstered them in long-lasting indoor/outdoor fabrics in solids and stripes. "Simple patterns aren't hard to move around if you need to switch things up," she says.

The long living room's dimensions called for visual trickery. "The sofa isn't exactly centered on the fireplace opposite it, so making it white like the wall helps camouflage it," Berry says.

The occasional well-placed contemporary accent piece shakes up the home's formal style in a way that's in step with the owners' personalities. "That mix is important so the house feels less serious," says Berry. In the breakfast nook, the modernity of a marble-topped tulip table is balanced by a set of casual wood chairs. A pretty collection of botanical-print plates doubles as artwork in the sun-filled breakfast nook.

A small, contained room is just the spot for a change of scene, as the yellow-papered powder room shows. "When people like color, the powder room is an easy place to put something bright and fun," Berry says.

The family room is a master class in unstudied polish, but there's no complicated secret to nailing the details. Berry says, "It's like having a checklist. Did you add something old and something wood? Are you representing all the finishes?" She pairs items like the organic texture of a rattan side table with a glossy garden stool to keep the eye moving and interested.

A custom rug not only delivers on the size the family room requires but also lets the piece neatly mirror the unique shape of the space. Four wicker armchairs surround a smooth white-painted wood game table, making the space perfect for family night.

French blue (the homeowners' favorite color) stars in virtually every room. It's bold and strong in some spaces, like the living room, and softened in others, like the primary bedroom, where Berry toned it way down on the Schumacher wallpaper so it would read as a neutral and balance the floral fabric upholstering the bed (Lee Jofa's Grenville). "It's quieter but still gives them a pattern so their walls don't feel forgotten," she says. Brass accents in the lighting and nightstands add a bit of patina and glamour while complementing all the cool blues and greens in the palette.

The candy-sweet girl's bedroom pairs a fancy flowery wallpaper (Bob Collins & Sons Inc.'s Bamboo Floral) with retail finds that look more high-end by association, like an Anthropologie chandelier and Pottery Barn bedding. The daybed is the investment piece here, since the homeowners can continue to use it as their daughter grows. "You don't have to start from scratch," Berry says. The home's previous owners left the ivory drapes when they moved out. She took them down, put a coordinating pink trim on the valance, and hung them back up.

The playroom's tongue-and-groove walls were in great shape and fit the casual style of the space, so all Berry ordered was a coat of fresh paint. The clients moved these window treatments from their old nursery and Berry shortened them to fit the room's dimensions. "I tried to use as much of their things as I could." Toys are a playroom must, so Berry's rule of thumb is to keep play spaces as clean-lined and neutral as possible and to fill the space with plenty of baskets for quick tidying.

Even in the subdued guest bath, Berry managed to work in a hint of the home's signature blue hue in the window's playfully patterned Roman shade. While the rest of the room veers toward neutral territory, colors within the rug match the shade's vibrancy, keeping the bold accent from standing out too much. Marble floor tiles installed in a running bond pattern are a new take on a common material.

The generous patio and landscaping was move-in ready when the couple bought the house so they did little more than pull large potted plants into the seating areas. Custom cushions dress up a patio set from Ballard Designs. "Outdoors, I tend to stick to blues and greens, like the sky and grass," says Berry.