Elemental Hydromagnesite
Elemental Hydromagnesite (#E9F0E9) is a soft green with a pastel character. It reads calm and airy, with enough chroma to feel intentional rather than washed out. Its HSL profile (120°, 19%, 93%) places it in the muted band at a light lightness. It works as a background wash, large-area fill, or soft illustration tone. Add a darker ink of the same hue when you need type over it. For a confident two-color system, pair it with its complementary violet. For something softer, pull in its analogous neighbors on either side of the wheel.
Etymology
Latin elementum, element — adjectival suffix -al. As a color modifier, elemental implies a neutral-and-foundational-and-natural-element quality where the hue carries the visual register of earth-and-stone-and-water-and-air foundational-and-elemental natural-mineral-and-pigment surface. Sits at the neutral-and-foundational end of the grid, parallel to foundational and primal in usage.
Mg₅(CO₃)₄(OH)₂·4H₂O magnesium-carbonate-hydrate mineral — the iconic pure-white speleothem-and-cave-deposit hydromagnesite of Wind-Cave in South Dakota. Hydromagnesite color refers to a freshly mined Wind-Cave-hydromagnesite speleothem-block face in headlamp-light: a pure white with the matte finish of cryptocrystalline magnesium-carbonate-hydrate cave-deposit with the characteristic hydromagnesite-balloon speleothem morphology.
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 = 0.012) — 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.