Shadowed Massicot
Shadowed Massicot (#3C4204) is a deep yellow with a jewel character. It carries the deep, saturated richness of a gemstone. Authoritative and slightly formal, it works well for type and heavy UI elements. Its HSL profile (66°, 89%, 14%) places it in the highly saturated band at a dark lightness. Best used in small doses, like logos, CTAs, focus rings, or highlight text, where its saturation becomes a feature rather than noise. For a confident two-color system, pair it with its complementary blue. For something softer, pull in its analogous neighbors on either side of the wheel.
Etymology
The past participle of shadow, used adjectivally for a color that reads as if partially in shadow rather than fully lit. Implies the slight darkening and cooling that any color undergoes when light is reduced — not the absence of color but the muting of it. Sits in the deep-and-cool end of the engine's grid, lighter than inky and warmer than somber.
Lead monoxide (PbO) — a yellow pigment used since classical times in oil painting and lead-glaze ceramics. Massicot was the standard yellow of medieval and Renaissance European painting before being replaced by chrome and cadmium yellows in the nineteenth century. The color refers to fresh Massicot pigment: a saturated, slightly red-shifted yellow with the matte finish of lead-oxide pigment.
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.