O511 — Black Sea
Blacks family#23272A
Valdani O511 (Black Sea) is a dark, subdued black shade with hex code #23272A and RGB values 35, 39, 42. Below you'll find the closest J&P Coates, Sullivans, and Cosmo equivalents — ranked by visual color similarity — plus 8 similar Valdani shades and color harmony pairings.
Brand Equivalents for Valdani O511
The five closest matches in each brand, ranked by CIEDE2000 perceptual color difference.
DMC
Anchor
Madeira
J&P Coates
Sullivans
Classic Colorworks
Weeks Dye Works
Gentle Art Sampler
Crescent Colors
Similar Valdani Colors to O511
Closest Valdani threads by perceptual color distance, sorted from most to least similar.
Working with Valdani O511
It pops on white and light fabric but nearly disappears on black, so pair it with a light or neutral ground.
Valdani O511 (Black Sea) is dark enough to define edges: stitchers reach for shades like it when a design needs crisp backstitch outlines or readable text.
Hand-dyed threads like Valdani O511 (Black Sea) are never perfectly flat; expect soft variegation. Stock up in a single dye lot up front, since later batches can read noticeably different.
Valdani O511 (Black Sea) sits a hair from Valdani 8111 (Black Light) (ΔE 2.9) — close enough to blend a strand of each for a smooth gradient or to swap one for the other in a pinch.
Color Harmonies for Valdani O511
Valdani threads that pair well with O511, based on color theory harmony rules in CIELAB color space.
Blacks Family
ValdaniO511 in context with nearby shades from the blacks color family.
About Valdani O511
Known as Black Sea, Valdani O511 is a dark, subdued shade sitting in the blacks family. This thread brings a dramatic and quiet presence to projects featuring dramatic backgrounds or wrought iron. Look for it in charts that feature night skies or silhouettes.
Frequently Asked Questions
Valdani O511 — what color is it?
The color of Valdani O511 is Black Sea — a dark black thread (hex #23272A, RGB 35, 39, 42). It shows up most in gothic accents and shadow textures.
What is the DMC equivalent of Valdani O511?
The closest DMC match for Valdani O511 (Black Sea) is DMC 3799 (Pewter Grey very dark) with a 79% match based on visual color similarity. Other near matches include DMC 3371 (Black Brown, 63%) and DMC 310 (Black, 60%).
Which Valdani threads are close to O511?
The closest Valdani threads to O511 are 8111 Black Light (ΔE 2.9), 8112 Black Medium (ΔE 2.91), and O531 Black Nut (ΔE 3.17). These are useful substitutes when O511 is unavailable or for building gradients.
What is Valdani O511 good for?
Valdani O511 (Black Sea) is commonly used in cross-stitch projects featuring gothic accents, shadow textures, outlines, lettering. Its dark tone works well for standalone motifs and as part of larger palettes. This page includes color harmonies and similar shades to pair with O511.
Is Valdani O511 (Black Sea) good for backstitching and outlines?
Yes — very dark shades like O511 are among the most-used backstitch and outlining colors. Work it in a single strand over one for crisp edges, lettering, and fine detail.