Castle Stone

Technical Profile

What color is Castle Stone? It's a medium cool gray with the hex code #525746. Colors similar to Castle Stone include Vista Paint Irish Moss, MPC Walworth Green, Sherwin-Williams Rookwood Dark Green. Comparing swatches side by side is the best way to spot the subtle differences that distinguish these close color relatives. Castle Stone has a cool (green) 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. Castle Stone (#525746) by PPG is a medium gray paint color with a gentle, subdued character. It delivers a versatile mid-tone depth that anchors a room without overwhelming it. 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. A Light Reflectance Value of 33 gives it moderate light reflection, striking a balance between brightness and depth. A mid-tone neutral at this depth adds sophisticated warmth or coolness to living rooms, bedrooms, and transitional hallways, grounding the space without closing it in. A satin or eggshell finish brings out the richness at this depth, and the slight sheen makes walls easier to maintain. For color coordination, Castle Stone pairs beautifully with blue tones for bold complementary contrast, or with neighboring green and yellow hues for a harmonious, flowing palette. Its cool (green) undertone means trim and ceiling whites should lean neutral to avoid a jarring clash. If PPG is unavailable in your area, close cross-brand alternatives exist from Vista Paint, MPC, Sherwin-Williams and others. In terms of mood and atmosphere, Castle Stone delivers a composed, professional calm often favored in contemporary and Scandinavian-inspired interiors. 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 a wide range of interior design styles. As part of the PPG palette, Castle Stone benefits from a curated selection of coordinating colors that the brand recommends for trim, accent, and ceiling pairings. As with any paint color, Castle Stone 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. Mid-tone shades like this look best when balanced with a mix of textures — think leather seating, brushed brass hardware, woven wool, and raw-edge wood. You can order Castle Stone (1128-7) directly from PPG or through major paint retailers, and we recommend purchasing a peel-and-stick sample to preview it on your wall before buying gallons.