These days, with an estimated 125,000 vehicles a day on average passing within just a few yards of its front door on Interstate 84, the Blue Colony Diner just off Exit 10 has been a destination for not only several generations of Newtowners but also countless others from neighboring communities as well as far-flung towns and cities across the nation and around the world.

Each of those customers has not only enjoyed the food, desserts, coffee, and beverages — but also undoubtedly the special kind of hospitality only an owner can provide. This year, the Blue Colony is celebrating an amazing 50 years of continuous operation, and is now under its third generation of ownership and management by the Marnelakis family.

Exit 10 off I-84 has been delivering hungry and weary travelers to the Blue Colony Diner since Eftihios “Eddy” Marnelakis first opened the doors in March 1973. Following his passing in late 2016, his son, George Marnelakis, and his family — wife Michelle, sons Eftihios and Mihali, and daughter Xristina — continue to carry on the tradition of greeting new and old friends and are serving up a warm welcome and comfort food with a Greek flair.

The Blue Colony seats 210 diners at booths and tables in two dining rooms split by a front counter loaded with pastries and baked goods, all made on premises. Packaged cookies, bars, and cupcakes are ready to go, as are any of several pies, the popular challah bread, and the creamy cheesecake for which Blue Colony is known. Regulars linger over a cup of coffee and breakfast — day or night — at the counter, watching the staff bustle in and out of the large kitchen just beyond.

All of this is housed inside a classic Art Deco diner, updated in 2003 from its original stone facade to the gleaming chrome and blue exterior that passersby find hard to miss. An extensive parking area surrounds the diner, well-lit at night, and always alive with music of the ‘50s, ‘60s, and ‘70s spilling out of loudspeakers placed over the doors.

Blue Colony Diner is a destination for highway travelers passing through the western part of Connecticut. Probably half of the customers are from out of town, said George, “but many we’ve seen pass through for years. We even know them by name,” he said. Locals make up the other half, with the Blue Colony Diner being a draw for high school students and school teams to meet after workouts and games.

“You see them in here with the teams, then the next thing you know, they’ve grown up and married and are bringing their kids in,” he said. “A diner is a local gathering place, and we’re open 24 hours a day.” The entire extensive menu is available 24/7 — dinner in the morning or breakfast at night.

To be a real diner means to make nearly everything from scratch, he added, something the Blue Colony Diner is proud to say it does. Vegetables and fruits are fresh, all of the meats used are roasted or grilled in the kitchen, and the challah bread and Italian loaf come out of the Blue Colony Diner ovens, as do the dozens of desserts and baked goods items.

“A diner has to have that social, warm feeling,” said George, and that is the goal the Marnelakis family strives to provide every customer.

A Sample of The Menu

Breakfast: Choose from more than two dozen egg dishes, any style. Eggs with blintzes (a thin, filled crepe) or gyro (lamb and beef strips) or liver are among the special options. French toast made from Blue Colony Diner’s challah bread is a big seller. Pancakes come with a variety of additions, or try the rolled pancake with blueberries or strawberries. Belgian waffles at Blue Colony Diner are a malted, crispy treat. Add bacon, ham, sausage, eggs, or fruit. Six variations on the egg sandwich are available. Jumbo bagels are delivered daily from Brooklyn. The Bagel All The Way is smeared with cream cheese, lettuce, tomato, cheese, onion, and topped with coleslaw.

Lunch: Three pages of more than 30 cold sandwiches, plus wraps, panini, triple-deckers, hot open sandwiches, and specialty sandwiches means there is something for everyone. A best seller is the open chicken souvlaki, with chunks of grilled chicken breast on pita with a tzatziki (cucumber yogurt) sauce. The Monte Cristo sandwich is also a favorite: ham, Swiss cheese, and turkey on French toast. Sandwiches usually come with French fries and coleslaw. All soups are made in the Blue Colony Diner kitchen.

Burgers: Burgers are one-third-pound all beef, with a variety of options; turkey burgers and vegetarian burgers are available as well. The Country Burger is topped with cheddar cheese, bacon, BBQ sauce, and fried onion rings.

Salads: There are more than a dozen salads, including the mesclun mix, combining greens, grilled chicken, avocado, Mandarin oranges, and Gorgonzola cheese.

Entrees: Dinner specials, such as beef stroganoff with noodles or broiled fresh red salmon change daily. Greek spanakopita, a spinach and feta pie; skewered meat or fish and vegetable shish kebab; London broil with mushroom sauce; seafood stuffed jumbo shrimp; and Italian specialties are among dozens of dinner options.

Kids Menu: From a simple peanut butter and jelly sandwich to sliced turkey with cranberry sauce, potato, and vegetable.

Beer, Wine, Full Bar: Yes

Price Range: $2 to $20

Blue Colony Diner is at 66 Church Hill Road, just off I-84 Exit 10, and is open 24 hours a day, seven days of the week. Call 203-426-0745 or visit bluecolonydiner.com for more information and a complete menu.