Chalky Aether
Chalky Aether (#C2D4EA) is a soft azure with a pastel character. It reads calm and airy, with enough chroma to feel intentional rather than washed out. Its HSL profile (213°, 49%, 84%) places it in the balanced 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 orange. For something softer, pull in its analogous neighbors on either side of the wheel.
Etymology
An adjectival form of chalk — used as a color modifier since the seventeenth century for hues with the matte finish of chalk pigment. Chalky white, chalky blue: low saturation combined with the optical mattness of micron-scale calcium carbonate. Sits at the pale-bucket alongside powder and dusty.
The classical Greek upper atmosphere — the saturated deep blue beyond the lower air, where the gods dwelt in Homeric and Hesiodic cosmology. The fifth Aristotelian element. Aether color refers to the upper-atmospheric blue at high-altitude horizon: a saturated, slightly cool very deep blue with the optical depth of long atmospheric column.
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.