Old Mill

Technical Profile

What color is Old Mill? It's a deep cool blue with the hex code #343B4E. Colors similar to Old Mill include Behr Limo-scene, Benjamin Moore Old Navy, Benjamin Moore Deep Royal. Comparing swatches side by side is the best way to spot the subtle differences that distinguish these close color relatives. Old Mill has a neutral undertone, which affects how it pairs with trim, flooring, and adjacent wall colors. Understanding a color's undertone is key to avoiding combinations that clash — it often matters more than the surface color itself. Old Mill (#343B4E) by Dunn-Edwards is a deep blue paint color with a gentle, subdued character. It delivers a grounded richness that adds drama and sophistication. On the temperature spectrum this shade carries a cool cast, lending calm and collected elegance. Its RGB channels are closely balanced, contributing to its neutral, even-keeled visual character. At an LRV of 23 it absorbs more light than it reflects, creating a moody, enveloping atmosphere. Deep blues like this deliver striking navy elegance in dining rooms, bedrooms, and exterior shutters. Satin or semi-gloss finishes help deep colors reflect just enough light to show their full depth, especially on accent walls and trim. For color coordination, Old Mill pairs beautifully with yellow tones for bold complementary contrast, or with neighboring blue and teal hues for a harmonious, flowing palette. Its neutral undertone means trim and ceiling whites should lean neutral to avoid a jarring clash. If Dunn-Edwards is unavailable in your area, close cross-brand alternatives exist from Behr, Benjamin Moore, Sherwin-Williams and others. In terms of mood and atmosphere, Old Mill projects a confident, tailored sophistication associated with classic nautical and Art Deco aesthetics. Designers often reach for shades like this when the goal is to shape how a room feels, not just how it looks. This shade is a natural fit for nautical, classic traditional, and Hamptons-style interiors. As part of the Dunn-Edwards palette, Old Mill benefits from a curated selection of coordinating colors that the brand recommends for trim, accent, and ceiling pairings. As with any paint color, Old Mill can shift noticeably between natural daylight, warm incandescent, and cool LED lighting — testing a sample swatch on your wall under different conditions is always recommended. Deep shades generally benefit from a quality primer and may require an extra coat for even, streak-free coverage. Deep tones pair beautifully with velvet upholstery, burnished metal fixtures, dark-stained wood, and textured wallcoverings on adjacent surfaces. You can order Old Mill (DEA185) directly from Dunn-Edwards or through major paint retailers, and we recommend purchasing a peel-and-stick sample to preview it on your wall before buying gallons.