Mannerly Cauldron
Mannerly Cauldron (#16091E) is a deep indigo with an earthy character. It leans grounded and natural, the kind of color that plays well with wood, clay, linen, and warm neutrals. Its HSL profile (277°, 54%, 8%) places it in the balanced band at a dark lightness. It works well as a headline, icon, or deep background in an otherwise light layout, pairing cleanly with cream, bone, and warm neutrals. For a confident two-color system, pair it with its complementary lime. For something softer, pull in its analogous neighbors on either side of the wheel.
Etymology
Old French manere, manner / way — adjectival suffix -ly. As a color modifier, mannerly implies a neutral-and-polite-and-formal quality where the hue carries the visual register of Edwardian-and-Belle-Époque polite-and-formal-and-mannerly interior-decoration-and-dress-attire coordinated-color tone. Sits at the neutral-and-friendly end of the grid, parallel to courteous and polite in usage.
Old French caudron, cooking pot — the deep-soot-blackened exterior of medieval-and-Renaissance European cast-iron cooking-vessels, hung over open hearth-fires. Cauldron color refers to a freshly soot-coated 16th-century cast-iron cauldron exterior over a peat-fire: a saturated, slightly cool deep black with the matte finish of multi-decade soot-and-grease sediment on hand-cast pig-iron. Also figures prominently in Shakespeare's Macbeth.
Closest matches
The nearest named color in three reference sources, ranked by perceptual distance (ΔE76 in CIELAB). ΔE < 1 is imperceptible to most viewers; ΔE > 10 is clearly different. When two sources point to the same hex they’re merged into one tile; click any to open that color’s page.
Variations
Click any swatch to exploreHarmonies
Accessibility
How this color appears to viewers with the four major color-vision-deficiency types. Computed via the Machado (2009) physiologically-based model. If a tile matches the original, the color reads the same to that viewer.
The color used as foreground text against pure white and pure black, with the contrast ratio and WCAG 2.1 grade. Aim for AA (4.5:1) for body text and AA Large (3:1) for 18 pt+ headlines; AAA (7:1) is the gold standard for long-form reading surfaces.
Wide gamut
The CSS Color 4 wide-gamut form of this color. Both swatches render the same color on every display — the P3 form only diverges from sRGB when a designer pushes channels outside sRGB's reach.
This color sits well within the sRGB cube. P3 and sRGB share the gray axis and most desaturated tones, so a P3 display renders this identically to an sRGB display.