Custom Nimbus
Custom Nimbus (#7F767A) is a balanced neutral with a mono character. It's a grayscale value, at home in typography, dividers, and the structural layer beneath stronger colors. Its HSL profile (333°, 4%, 48%) places it in the muted band at a mid lightness. It works well as secondary text, borders, and placeholder states. A reliable middle gray that reads cleanly in either light or dark contexts. Pair it with almost any saturated accent. It's built to sit underneath or behind stronger colors without fighting them.
Etymology
Latin cōnsuētūdō, habit / usage — adjectival usage of custom. As a color modifier, custom implies a neutral-and-individually-fitted-and-bespoke quality, the neutral color of Savile-Row-tailoring and Gucci-and-Hermès-Made-to-Measure individually-fitted-and-bespoke craft-finish. Sits at the neutral-and-traditional end of the grid, parallel to bespoke and tailored in usage.
The Latin meteorological term for rain cloud — particularly the dense, dark nimbostratus layer that brings sustained precipitation rather than convective bursts. The color refers to a fully developed nimbostratus deck: a soft, slightly muted dark gray with the optical density of a cloud already releasing rain. Cooler than smoke, warmer than slate, with the meteorological weight of a sky color that defines an entire weather pattern.
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
This color has effectively no chroma (OKLCH C = 0.013) — it’s on the grayscale axis. Hue rotations don’t change a grayscale color, so complementary, analogous, triadic, and split-complementary all reduce to the same value. They aren’t shown because four identical tiles would be misleading.
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.