Ironed Diatom
Ironed Diatom (#028658) is a deep teal 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 (159°, 97%, 27%) 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 magenta. For something softer, pull in its analogous neighbors on either side of the wheel.
Etymology
Old English īsern, iron — past-participle of iron. As a color modifier, ironed implies a clear-and-smoothed-and-pressed quality, the crisp color of Mid-Century-Modern freshly-ironed-shirt-and-trouser dress-attire textile finish. Sits at the crisp-and-finished end of the grid, parallel to pressed and starched in usage.
Single-celled algae with intricate silica cell walls — among the most numerous photosynthetic organisms on Earth, producing roughly a quarter of global oxygen. The color refers to a diatom-bloom-tinted lake at midday: a soft, slightly cool deep blue-green with the optical complexity of suspended single-celled algae.
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.